EXPLANATION OF THE FIGURES. 



XV 



Pig. 



199 The anatomy of the mouth of 



the butterfly 



Edwards 



Fig. 



224 Capillary vessels of the intestinal 

 villus of a hare . Wagner 



200 The jaws of "the snapping tur- I 225 Circulation of the blood in the 



tie (Emysaurus serpentina). 

 [Agassiz 



201 The head of a whale, shewing 



the whale-bone . . Ibid. 



202 The head of an ant-eater. 



[Ibid. 



203 The head of an alligator. Ibid. 



204 The head of a skate-fish (My- 



liobatis), shewing palate teeth. 

 [Ibid. 



205 The skull of the horse. 



206 The skull of a squirrel. 



207 The skull of a tiger. 



208 Globules of the blood of man. 



[Wagner 



209 Ditto of the common goat (Ca- 



pra domestica) . . Ibid. 



210 Blood and lymph globules of 



the pigeon (Columba domes- 



tica) 



Ibid. 



211 Blood globules of the Proteus 



anyumus 



Ibid. 



212 Blood and lymph globules of 



the Triton cristatus . Ibid. 



213 Blood globules of the Rana 



esculent a 



Ibid. 



214 Blood and lymph globules of the 



Cobitis fossilis 



Ibid. 



inter-digital membrane of the 

 hind foot of a frog, magnified 

 three diameters . Ibid. 



226 The same, magnified forty-five 



diameters . * . . Ibid. 



227 The same, magnified one hun- 



dred and ten diameters. Ibid. 



228 A venous branch, magnified three 



hundred and fifty times. Ibid. 



229 View in outline of a vein, mag- 



nified six hundred times. Ibid. 



230 A portion of the lung of a living 



triton, drawn under the micro- 

 scope, magnified one hundred 

 and fifty times . . Ibid. 



231 Capillary circulation in the 



lung .... Ibid. 



232 The anatomy of the Holothuria 



tubulosa 



Delle Chiaje 



233 The branchiae of the Arenicola. 



[Edwards 



234 The respiratory apparatus of the 



Nepa cinerea. Leon Dufour 



235 Lungs, heart, andprincipal blood- 



vessels of man 



Edwards 



236 Lung of the triton, magnified. 



[Wagner 



237 Lung of thetriton, injected. Ibid. 



215 Blood globules of the Ammocetes ! 238 Lungof the frog, magnified. Ibid. 

 branchialis . . Ibid. 239 Lung of the tortoise ditto. Ibid, 



laid open to shew the 240 Lung of the serpent ditto. Ibid. 



216 Vein 

 valves 



Cloquet 



217 Diagram of the course of the 



blood in mammals and birds. 

 [Edwards 



218 Diagram of an ideal section of 



the human heart . Ibid. 



219 Diagram of the circulation in 



reptiles. 



Ibid. 



220 Diagram ol the circulation in 



fishes . . . Ibid. 



221 The heart and vascular system 



of the Doris . . Ibid. 



222 The vascular system of the 



lobster . . . Ibid. 



223 The organs of circulation in a 



nenropterous insect . Ibid. 



241 Terminal vesicles of the human 



lung 



Ibid. 



242 Portion of the lung of a hog. Ibid. 



243 Portion of the human lung mag- 



nified two hundred times. Ibid. 



244 Rudiment of the lung from the 



embryo of a fowl 



Ibid. 



245 Rudimentary lung from the em- 



bryo of a sheep . Miiller 



246 Termination of the bronchi of 



the embryo of a hog. Rathke 



247 Diagram of experiment to illus- 



trate Endosmose andExosmose. 



248 Glands from the auditory pas- 



sage of the human subject. 

 [Wagner 



