142 BIOLOGY AND ITS MAKERS 
comparative anatomy there gradually emerged naturalists 
who compared the structure of the higher animals with that 
of the simpler ones. These comparisons brought out so 
many resemblances and so many remarkable facts that anat- 
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Fic. 37.—SEVERINUS, 1580-1656. 
omy, which seems at first a dry subject, became endued with 
great interest. 
Severinus.—The first book expressly devoted to compara- 
tive anatomy was that of Severinus (1580-1656), designated 
