LIST OF ILLUSTRATIONS. XV 



FIG. PAGR 



209. Transverse section of villus of dog's intestine 170 



210. Longitudinal section of large intestine of child 171 



211. Section of duodenum of cat I7 1 



212. Section of human large intestine i7 2 



213. Peyer's patch from small intestine of cat i7 2 



214. Section of small intestine of child 173 



215. Section of injected small intestine of cat 174 



216. Section of liver of hog i7 6 



217. Section of human liver 177 



218. Diagram of structure of liver . , 177 



219. Section of injected human liver I7 8 



220. Hepatic cells from human liver 178 



221. Section of uninjected human liver 178 



222. Section of centre of lobule of human liver 179 



223. Section of liver of frog 179 



224. Section of rabbit's liver, showing bile-capillaries 180 



225. Section of dog's liver, showing interlobular vessels 180 



226. Transverse section of large bile-duct 181 



227. Section of human parotid gland 183 



228. Acini of human parotid gland 183 



229. Section of human sublingual gland 184 



230. Section of human pancreas 185 



231. Human pancreas, showing area of immature cells 186 



232. Section of developing gut of rabbit embryo 187 



233. Sagittal section of nine-day rabbit embryo 188 



234. Longitudinal section of human kidney (Henle] 191 



235. Section of human kidney, showing general arrangement 192 



236. Section of partially-injected human kidney 193 



237. Diagram of the kidney 194 



238. Uriniferous tubules of human kidney 196 



239. Section of kidney of amphiuma 197 



240. Constituents of medulla of human kidney 197 



241. Section of medulla of human kidney 198 



242. Section across papilla of human kidney 199 



243. Section of injected kidney of dog 200 



244. Transverse section of human ureter 201 



245. Section of human bladder 202 



246. Developing kidney of rabbit embryo 204 



247. Developing kidney of rabbit embryo 205 



248. Developing kidney of cow embryo 205 



249. Diagram illustrating structure of testicle 207 



250. Section of human testicle 208 



251. Section of human seminiferous tubule 209 



252. Spermatogenesis in testicle of dog 209 



253. Spermatogenesis in testicle of musk-rat 210 



254. Spermatogenesis in testicle of musk-rat 210 



255. Spermatogenesis in testicle of musk-rat 211 



256. Human testicle, showing interstitial cells 211 



257. Section of tubule of human epididymis 212 



258. Section through epididymis of child 213 



259. Human spermatozoa 215 



260. Human spermatozoa, highly magnified 215 



261. Section of penis of child 217 



262. Erectile tissue of human penis 217 



263. Section of human prostate gland 220 



