LIST OF ILLUSTRATIONS 



FIG. 



220. Eye of man, diagrammatic horizontal section 



221. Petromyzon marinus .... 



222. Myxine glutinosa, head 



223. Petromyzon marinus .... 



224. Scyllium canicula, side view of skull . 



225. Scyllium, pectoral arch 



226. Scyllium canicula, dissection 



227. Diagram of the vascular system of a fish 



228. Scyllium catulus ..... 



229. Dogfish, egg-case .... 



230. Scyllium, embryo, with gills, etc. 



231. Lamna cornubica 



232. European sting-ray (Urolophus cruciatus) 



233. Skeleton of Urolophus testaceus . 



234. Heptanchus, side view of skull . 



235. Salmo fario, fins, etc. .... 



236. Salmo fario, caudal end of vertebral column 



237. Pleuronectes cynoglossus 



238. Ctenoid and ganoid scales . 



239. Polypterus birchir .... 



240. Skull of sturgeon 



241. Salmo fario, entire skull, left side 



242. Premaxillse of Sargus 



243. Hippocampus (sea-horse) . 



244. Ceratodus fosteri .... 



245. Ceratodus fosteri, anterior portion of skeleton 



246. Rana temporaria .... 



247. Rana temporaria, skeleton . 



248. Rana temporaria, skull, different views 



249. Rana esculenta, shoulder girdle 



250. Rana esculenta, pelvic girdle from right side 



25 1 . Rana temporaria, dissection from left side 



252. Rana temporaria, heart with cavities laid open 



253. Rana temporaria, arterial system, etc. . 



254. Rana temporaria, venous system, etc. 



255. Rana esculenta, brain from above and below 



256. Rana esculenta, urinogenital organs of male . 



257. Rana esculenta, urinogenital organs of female 



