INDEX 



Abyssal fauna, 482. 



Anabolism, 286. 



Analogy versus homology, 241- 

 248. 



Anatomy, definition of, 8 ; phil- 

 osophical, 241-281. 



Animal functions, classification 

 of, 23-25. 



Animal life, organs and func- 

 tions of, 26-28. 



Animals and plants, distinction 

 between, 4. 



Animals, general structure of, 

 11-23. 



Animal structure, general laws 

 of, 241-281. 



Aortic arches, origin of, 390. 



Arteries, 382. 



Astigmatism, 115. 



Binocular perspective, 149. 



Blind spot, 132. 



Blood, globules of, 347-349, 351, 

 35 2 . 353 I plates of, 349 ; chem- 

 ical composition of, 349 ; 

 plasma, 350 ; coagulation of, 

 350 ; functions of, 351 ; origin 

 and history of, 352 ; compar- 

 ative morphology of, 354 ; em- 

 bryonic development of, 356 ; 

 33 



circulation of, in man, 375- 

 380 ; in reptiles and amphibi- 

 ans, 385 ; in arthropods, 400; 

 in bivalves, 402 ; in gastro- 

 pods, 403 ; in cephalopods, 

 404 ; in echinoderms, 405 ; in 

 insects, 408. 



Blood system of mammals, 385 ; 

 of birds, 385 ; of reptiles and 

 amphibians, 385 ; of fishes, 

 387 ; of arthropods, 399 ; 

 of bivalves, 401 ; of gastro- 

 pods, 403 ; of cephalopods, 

 404 ; of echinoderms, 404 ; of 

 ccelenterates, 406 ; of proto- 

 zoans, 408 ; of insects, 408. 



Blood vessels, 382. 



Botanical temperature regions, 

 472. 



Brachyopy, 113. 



Brain of man, 30, 72 ; convolu- 

 tions of, 34; interior structure 

 of, 35 ; microscopic structure 

 of, 35 ; embryonic develop- 

 ment of, 37 ; functions of 

 parts of, 39-45- 



Brain of vertebrates, 72. 



Brain, relative size of, 73, 74. 



Breathing, mechanics of, 361, 

 369 ; transition from gill to 

 495 



