XVI 



EXPLANATION OF THE FIGURES. 



rig. 



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- 



lecanus onocrotalus. Wagner 



256 Cowper's gland of the hedge- 



hog (Erinaceus) 

 257 Parotid gland of 

 infant 



Ibid, 

 a new-born 

 Weber 



258 Kidney and supra-renal capsule 

 Wagner 



of an infant 



259 Portions of do. magnified. Ibid 



260 Do. magnified 60 diameters. Tbid. 



261 Termination of one of the tubuli 



magnified 250 times . Ibid. 



262 Kidney of the porpoise (Delphi- 



nus phoctzna) 

 263 Lobules of the 



Miiller 



human liver. 

 [Wagner 

 264 A branch of the hepatic vein and 



liver lobules 



Ibid. 



265 Superficial lobules of the liver. 



266 The intra-lobular 



biliary vessels 

 267 



[Kiernan 

 plexus of 

 Ibid. 



A transverse section of the 

 lobes of the liver . Ibid. 



268 A view, magnified 40 times, of 

 the liver of a newt. Wagner 



269 272 Show the development of 

 the liver . . M filler 



273 Ramifications of the bronchi 

 from the embryonic Falco tin- 

 nunculufi . . Wagner 



Pig, 



282 The ova of a fresh- water polyp 



(Hydra) . . Agassiz 



283 The egg of an insect the 



snow-flea (Podurclla). Ibid. 



284 The primary ova of a bird 



magnified . . Wagner 



285 Theeggsofthe/Vrofa. Agassiz 



286 Theovarial 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. I bid. 



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 

 oftheallantois: e, embryo ; z,x, 

 membrane arising to form the 

 amnios ; a, the allantois ; y, 

 the yolk. 



274, 276 Rudimentary form of the | 312 The same fully developed; the 



parotid gland . . Miiller 



277 Lohulesoftheparotidgland.lhid. 



278 Development of the liver in the 



tinnuncnlus Wagner 



279, 280 Malpigliian bodies from the 



kidney of the Triton and Stnx 



aluco . . Huselike 



281 The egg of a skate-fish (M,/Iio- 



- . 



allantois (o) is further deve- 

 loped and bent upwards ; the 

 upper part of the yolk (d, </) 

 is nearly separated from the 

 yolk sphere, and is TO beeome 

 the inte>tine ; the heart (h) is 

 already distinct and connected 

 by threads with the blood 

 layer of the body. 



