The great French zoologist Lamarck (1744-1829) was best known for his theory of evolution, called 'soft inheritance', whereby organisms pass down acquired characteristics to their offspring. Originally a soldier, Lamarck later studied medicine and biology. His distinguished career included admission to the French Academy of Sciences (1779), and appointments as Royal Botanist (1781) and as professor of zoology at the Musee Nationale d'Histoire Naturelle in 1793. Acknowledged as the premier authority on invertebrate zoology, he is credited with coining the term 'invertebrates'. In this 1809 work, translated into English in 1914, he outlines his theory that under the pressure of different external circumstances, species can develop variations, and that new species and genera can eventually evolve as a result. Darwin paid tribute to Lamarck as the man who 'first did the eminent service of arousing attention to the probability of all change ... being the result of law'.

Best known for his ideas relating to evolution, French naturalist Jean-Baptiste Lamarck (1744-1829) first built his reputation as a botanist and was elected to the prestigious Academie des Sciences in 1779. His career took a new turn in 1793 when he was made professor of 'insects, worms and microscopic animals' at the Museum National d'Histoire Naturelle, although he lacked prior knowledge of the subject area. Undaunted, Lamarck set out to classify organisms which few naturalists had considered worthy of study since Linnaeus. He was the first to distinguish vertebrates from 'invertebrates' - a term he coined - by the presence of a vertebral column. In this groundbreaking seven-volume work, published between 1815 and 1822, he arranges invertebrates into twelve classes, laying the foundations for the modern study of these organisms. Volume 1, first published in 1815, introduces zoological concepts and begins the classification with the simplest microscopic organisms, the infusoria.

Best known for his ideas relating to evolution, French naturalist Jean-Baptiste Lamarck (1744-1829) first built his reputation as a botanist and was elected to the prestigious Academie des Sciences in 1779. His career took a new turn in 1793 when he was made professor of 'insects, worms and microscopic animals' at the Museum National d'Histoire Naturelle, although he lacked prior knowledge of the subject area. Undaunted, Lamarck set out to classify organisms which few naturalists had considered worthy of study since Linnaeus. He was the first to distinguish vertebrates from 'invertebrates' - a term he coined - by the presence of a vertebral column. In this groundbreaking seven-volume work, published between 1815 and 1822, he arranges invertebrates into twelve classes, laying the foundations for the modern study of these organisms. Volume 2, first published in 1816, covers polyps and radiata.

Best known for his ideas relating to evolution, French naturalist Jean-Baptiste Lamarck (1744-1829) first built his reputation as a botanist and was elected to the prestigious Academie des Sciences in 1779. His career took a new turn in 1793 when he was made professor of 'insects, worms and microscopic animals' at the Museum National d'Histoire Naturelle, although he lacked prior knowledge of the subject area. Undaunted, Lamarck set out to classify organisms which few naturalists had considered worthy of study since Linnaeus. He was the first to distinguish vertebrates from 'invertebrates' - a term he coined - by the presence of a vertebral column. In this groundbreaking seven-volume work, published between 1815 and 1822, he arranges invertebrates into twelve classes, laying the foundations for the modern study of these organisms. Volume 3, first published in 1816, covers tunicates, worms and insects.

Best known for his ideas relating to evolution, French naturalist Jean-Baptiste Lamarck (1744-1829) first built his reputation as a botanist and was elected to the prestigious Academie des Sciences in 1779. His career took a new turn in 1793 when he was made professor of 'insects, worms and microscopic animals' at the Museum National d'Histoire Naturelle, although he lacked prior knowledge of the subject area. Undaunted, Lamarck set out to classify organisms which few naturalists had considered worthy of study since Linnaeus. He was the first to distinguish vertebrates from 'invertebrates' - a term he coined - by the presence of a vertebral column. In this groundbreaking seven-volume work, published between 1815 and 1822, he arranges invertebrates into twelve classes, laying the foundations for the modern study of these organisms. Volume 4, first published in 1817, continues to classify insects.

Best known for his ideas relating to evolution, French naturalist Jean-Baptiste Lamarck (1744-1829) first built his reputation as a botanist and was elected to the prestigious Academie des Sciences in 1779. His career took a new turn in 1793 when he was made professor of 'insects, worms and microscopic animals' at the Museum National d'Histoire Naturelle, although he lacked prior knowledge of the subject area. Undaunted, Lamarck set out to classify organisms which few naturalists had considered worthy of study since Linnaeus. He was the first to distinguish vertebrates from 'invertebrates' - a term he coined - by the presence of a vertebral column. In this groundbreaking seven-volume work, published between 1815 and 1822, he arranges invertebrates into twelve classes, laying the foundations for the modern study of these organisms. Volume 5, first published in 1818, covers arachnids, crustaceans, annelids, cirripedes and conchifera.

Best known for his ideas relating to evolution, French naturalist Jean-Baptiste Lamarck (1744-1829) first built his reputation as a botanist and was elected to the prestigious Academie des Sciences in 1779. His career took a new turn in 1793 when he was made professor of 'insects, worms and microscopic animals' at the Museum National d'Histoire Naturelle, although he lacked prior knowledge of the subject area. Undaunted, Lamarck set out to classify organisms which few naturalists had considered worthy of study since Linnaeus. He was the first to distinguish vertebrates from 'invertebrates' - a term he coined - by the presence of a vertebral column. In this groundbreaking seven-volume work, published between 1815 and 1822, he arranges invertebrates into twelve classes, laying the foundations for the modern study of these organisms. Volume 6, published in two parts between 1819 and 1822 (reissued here together), continues with the study of conchifera and covers molluscs.

Best known for his ideas relating to evolution, French naturalist Jean-Baptiste Lamarck (1744-1829) first built his reputation as a botanist and was elected to the prestigious Academie des Sciences in 1779. His career took a new turn in 1793 when he was made professor of 'insects, worms and microscopic animals' at the Museum National d'Histoire Naturelle, although he lacked prior knowledge of the subject area. Undaunted, Lamarck set out to classify organisms which few naturalists had considered worthy of study since Linnaeus. He was the first to distinguish vertebrates from 'invertebrates' - a term he coined - by the presence of a vertebral column. In this groundbreaking seven-volume work, published between 1815 and 1822, he arranges invertebrates into twelve classes, laying the foundations for the modern study of these organisms. In volume 7, first published in 1822, Lamarck continues to classify molluscs.

The great French zoologist Lamarck (1744 1829) was best known for his theory of evolution, called 'soft inheritance', whereby organisms pass down acquired characteristics to their offspring. Originally a soldier, Lamarck later studied medicine and biology, becoming particularly interested in botany; his distinguished career included admission to the French Academy of Sciences (1779), and appointments as Royal Botanist (1781) and as professor of zoology at the Mus e Nationale d'Histoire Naturelle in 1793. Acknowledged as the premier authority on invertebrate zoology, he is credited with coining the term 'invertebrates'. This work, published in Paris in 1801, expands on Linnaeus' classification system, introducing seven sub-categories, creating finer divisions along lines of the species' inherent physical traits, and describing their natural characteristics and organisation. Also included is Lamarck's museum lecture, delivered in 1800, in which he first set out his ideas on evolution.

The great French zoologist Lamarck (1744-1829) was best known for his theory of evolution, called 'soft inheritance', whereby organisms pass down acquired characteristics to their offspring. Originally a soldier, Lamarck later studied medicine and biology, becoming particularly interested in botany. His distinguished career included admission to the French Academy of Sciences (1779), and appointments as Royal Botanist (1781) and as professor of zoology at the Musee Nationale d'Histoire Naturelle in 1793. Acknowledged as the premier authority on invertebrate zoology, he is credited with coining the term 'invertebrates'. In this two-volume work of 1809, he outlines his theory that under the pressure of different external circumstances, species can develop variations, and that new species and genera can eventually evolve as a result. Darwin paid tribute to Lamarck as the man who 'first did the eminent service of arousing attention to the probability of all change ... being the result of law'.

The great French zoologist Lamarck (1744-1829) was best known for his theory of evolution, called 'soft inheritance', whereby organisms pass down acquired characteristics to their offspring. Originally a soldier, Lamarck later studied medicine and biology, becoming particularly interested in botany. His distinguished career included admission to the French Academy of Sciences (1779), and appointments as Royal Botanist (1781) and as professor of zoology at the Musee Nationale d'Histoire Naturelle in 1793. Acknowledged as the premier authority on invertebrate zoology, he is credited with coining the term 'invertebrates'. In this two-volume work of 1809, he outlines his theory that under the pressure of different external circumstances, species can develop variations, and that new species and genera can eventually evolve as a result. Darwin paid tribute to Lamarck as the man who 'first did the eminent service of arousing attention to the probability of all change ... being the result of law'.