XVI 



EXPLANATION OF THE FIGURES. 



Fig. 



249 Sudoriparous glands from the 



palm of the hand. Wagner 



250 Do. do. . . Gurlt 



251 Thin layer of the scalp mag- 



nified . . . Ibid. 



252 The salivary glands of insects 



[Ramdohr and Succow 



253 Glands of insects . Ibid. 



254 Do. do. . Ibid. 



255 Harderian gland of the Pe- 



lecanns onocrotalus. Wagner 



256 Cowper's gland of the hedge- 



hog (Erinaceus*) . Ibid. 



257 Parotid gland of a new-born 



infant . . . Weber 



258 Kidney and supra-renal capsule 



of an infant . . Wagner 



259 Portions of do. magnified. Ibid 



260 Do. magnified 60 diameters. Ibid. 



261 Termination of one of the tubuli 



magnified 250 times . Ibid. 



262 Kidney of the porpoise (Delphi- 



nus phoccena) . . Miiller 



263 Lobules of the human liver. 



[Wagner 



264 A branch of the hepatic vein and 



liver lobules . . Ibid. 



265 Superficial lobules of the liver. 



[Kiernan 



266 The intra-lobular plexus of 



biliary vessels . . Ibid. 



267 A transverse section of the 



lobes of the liver . Ibid. 



268 A view, magnified 40 times, of 



the liver of a newt. Wagner 

 269272 Show the development of 



the liver . . Miiller 

 273 Ramifications of the bronchi 



from the embryonic Falco tin- 



nunculus . . Wagner 

 274, 276 Rudimentary form of the | 



parotid gland . . Miiller i 



277 Lobules of the parotid gland.Ibid. 



278 Development of the liver in the 



Falco tinnunculus Wagner 



279, 280 Malpighian bodies from the 



kidney of the Triton and Strix 



aluco . . Huschke 



281 The egg of a skate-fish (Mylio- 



batis). 



Agassiz 



Fig. 



282 The ova of a fresh-water polyp 



(Hydra) . . Agassiz 



283 The egg of an insect the 



snow-flea (Podurella). Ibid. 



284 The primary ova of a bird 



magnified . . Wagner 



285 TheeggsoftliePyrwfo. Agassiz 



286 The ovarial sacs of a Monoculus, 



[Ibid. 



287 Ideal section of a fowl's egg. 



[Baer 



288 Cell layer of the germ. Agassiz 



289 Separation of the cell layer in- 



to three laminae . . Ibid. 



290 Embryo of a crab, showing the 



incipient rings . . Ibid. 



291 Embryo of a vertebrate animal, 



showing the dorsal furrow.Ibid. 

 292294 Sections of the embryo, 

 showing the formation of the 

 dorsal canal . . Ibid 



295 Section showing the position of 



the embryo of a vertebrate 

 animal in its relation to the 

 yolk . . . Ibid. 



296 Section showing the same in an 



articulate animal . Ibid. 



297 308 Sections showing the suc- 

 cessive stages of development 

 of the white-fish magnified. 



[Ibid. 



309 The young white-fish just es- 

 caped from the egg, with the 

 yolk not yet fullytakenin. Ibid. 



310 311 Sections of the embryo of 

 a bird, showing the formation 

 of the allantois : e, embryo ; x,x, 

 membrane arising to form the 

 arnnios ; a, the allantois ; y, 

 the yolk. 



312 The same fully developed; the 

 allantois (a} is further deve- 

 loped and bent upwards ; the 

 upper part of the yolk (d, d} 

 is nearly separated from the 

 yolk sphere, and is to become 

 the intestine ; the heart (h ) is 

 already distinct and connected 

 by threads with the blood 

 layer of the body. 



