XVI 



ILLUSTRATIONS. 



.FIGUBE PAGE 



212. The thyroid gland of Sana 



esculenta .... 323 



213. The lymphatic gland of Rana 



' esculenta .... 324 



214. The male urine-genital organs . 331 



215. The right kidney . . .332 



216. The blood vessels and lym- 



phatics of the kidney . . 333 



217. Vertical sections through the 



kidney . (coloured} Plate II. 



218. The uriniferous tubes . . 335 



219. A gold preparation of the kidney 



ofEana esculenta 



(coloured} Plate II. 



220. Transverse section of the kidney 338 



221. The bladder . . . .339 



222. The male reproductive organs . 341 



223. Various preparations from the 



testis 342 



224. The female reproductive organs 344 



225. Preparations from ovary and 



oviduct .... 346 



226. The male urino-genital organs 348 



227. The fat-body of Rana esculenta 349 



228. The epidermis from the head of 



Rana esculenta . . . 367 



229. Vertical section through the 



skin of the back . . . 368 



230. Surface view of epidermis of 



Rana temporaria . . 368 



231. Nerve terminations of the 



branched pigment-cells of 

 the cutis .... 368 



232. The temporary papillae in Rana 



temporaria . . . 37 1 



233. The epidermis of the supple- 



mental toe of Rana escu- 

 lenta 375 



234 I. Fore-foot of a male frog . 375 

 234 II. The swelling on the supple- 

 mental toe of a male frog . 375 



235. The blood-vessels and lym- 



phatics of the skin . . 376 



236. Lateral sense-organ of tadpole 



of frog . . . .378 



FIGURE PAGE 



237. Various parts from the fungi- 

 form papillae . . . 381 



238, 239. Frontal sections through 



the nose of two tadpoles . 384 



240 I A. Bowman's glands in situ 



from Rana temporaria . 386 



240 I B. Section of Bowman's gland 386 



240 II. Vessels of nasal mucous 



membrane of Rana esculenta 386 



241. Separations from the olfactory 



mucous membrane of Rana 

 temporaria. . . . 388 



242. The tympanic membrane of 



Rana esculenta . . . 389 



243. The columella . . -391 



244. Antero-posteri or section through 



the capsule of the right 

 labyrinth of Rana esculenta 392 



245. The membranous labyrinth of 



Rana esculenta . . . 394 



246. Part of the outer wall of the 



perilymphatic space . . 395 



247. 248. The right membranous 



labyrinth of Rana esculenta 397 

 249, 250. The membranous labyrinth 



of Rana esculenta . 399, 401 



251. Preparations from the ear of 



Rana esculenta . . . 402 



252. The nerve-terminations in the 



membranous labyrinth of 

 Rana esculenta . . . 404 



253. Endothelium from the inner 



surface of the sclerotic coat . 406 



254. 255. Preparation from cornea of 



Rana esculenta . . 407, 408 



256. The vessels of thechoroid and iris 410 



257. Fibres from the lens of the frog 414 



258. Vertical section through retina 



of frog . . . .415 



259. Various preparations from the 



eye of the frog . . -417 



260. The vessels of the vitreous body 421 



261. Preparations from the nicti- 



tating membrane of Rana 

 esculenta . . . .423 



