1G3 BULLETIN OF THE MUSEUM OF COMPAEATIVE ZOOLOGY. 



PLATE X. 



Fig. 245. Ophiacantha vcjiratica, below ; x- 



Fig. 246. " " above ; f. 



Fig. 247. " " spine diagram ; ^. 



Fig. 248. " cuspidata, below; ^. 



Fig. 249. " " above; j. 



Fig. 250. " " spine diagram ; '}. 



Fig. 25L " cosrnica, below; f. 



Fig. 252. " " above ; ^. 



Fig. 253. " " spine diagram ; •^. 



Fig. 254. " " disk-spine ; ^,\ 



Fig. 255. Ophiolehes vcstitus, below ; f. 



Fig. 25(5. " '• above ; |. • 



Fig. 257. " " arm-spine; ^. 



Fig. 258. Ophiacantlia nodosa, below ; f . 



Fig. 25 y. " " above; \. 



Fig. 2C0. " " disk-spine strip[)ed of skin ; ^-. 



Fig. 2G1. " "an upper ann-spiue ; ^. 



Fig. 2G2. " cusmica, spine diagram ; ^. 



Fig. 263. " " disk -spine ; ^. 



Fig. 264. " *' spine diagram ; \. 



Fig. 265. " " disk-.spine; 3j5.. 



Fig. 266. " cornufa, arm-joints ; [. 



Fig. 267. " rosea, arm-spines; f. 



Fig. 268. " " an under and a side aiTO-plate ; f . 



Fig. 269. " cosmicct, a mouth-angle ; "• 



Fig. 270. " " arm-spine; ^. 



Fig. 271. " secjrsta, arm-.spines ; ^. 



Fig. 272. " scrrata, arm-spines; f. 



Fig. 273. " " disk-grain ; much enlarged. 



Fig. 274. " longidcns, a mouth-angle and two under arm-plates ; ^. 



Fig. 275. " imago, arm-spines ; ^. 



Fig. 276. " " disk -grain ; V- 



Fig. 277. " levispiua, arm-joint; ^. 



