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TEXTBOOK OF ZOOLOGY 



valuable contributions to the development of the microscope are 

 the enviable accomplishments of this man. 



Carolus Linnaeus (1707-1778) was a very eminent Swedish biolo- 

 gist, who, like many early students of this subject, was educated 

 as a physician. He followed somewhat in the footsteps of Ray 

 (1628-1705), who had paved the way by fixing a definite conception 



Fig. 12. — Linnaeus (1707-1778), an outstanding Swedish biologist of his time. 

 (Reprinted by permission from Locy, Growth of Biology, published by Henry Holt 

 and Company, Inc.) 



of a species and introduced the use of anatomical features in dis- 

 tinguishing the larger groups. Linnaeus believed in a rigidly fixed 

 species and had divided the animals into six classes, 32 sub-classes, 

 and numerous genera and species. In spite of his idea of the in- 

 variability of species his classification system was so simple, clear, 

 and flexible that it has persisted to the present time. His was the 



