LIST OF THE WOOD-CQTS. 



209. Magnified view of marginal tentacles 133 



210. Spherical embryo 134 



211. The same, somewhat more advanced ......... 134 



212. The same before it becomes attached 134 



213. Group of embryos attached, in difl'erent stages of development .... 134 



214. Dilfcrent stages of growth beyond those of Fig. 213 134 



215. Profile of Mklicertum geougicum, natural size 135 



21G. Digestive cavity and point of junction of the chyraiferous tubes . . . 135 



215". SxAunopiiORA LACiNiATA, having eight tentacles 136 



21G°. Quarter of the disk of a young Staurophora, with sixteen large tentacles . 136 



217. Young Medusa somewhat more advanced than Fig. 216' 136 



218. Different stages of actinostome intermediate between that of Figs. 215" and 219 136 



219. Young Staurophora, having the aspect of the adult . . . . . .137 



220. Profile view of Ptvchogena LACTEA, somewhat reduced .... 138 



. 138 



138 

 . 138 



138 

 . 141 



141 

 . 149 



150 



221. Magnified view of the genital organs, seen from the abactinal pole 



222. Same as Fig. 221, seen in profile ...... 



223. Actinostome ........... 



224. Magnified base of tentacles and club-shaped appendages . 



225. Cluster of Dynamena pumila. (L. Agassiz.) .... 



226. Magnified portion of stem of Fig. 225. (L. Agassiz.) 



227. Young Nemopsis Bachei, with four tentacles .... 



228. Somewhat more advanced Nemopsis 



229. Magnified view of the sensitive bulb 150 



230. Nemopsis in which the genital organs extend a considerable distance along the 



chymiferous tubes 150 



231. Magnified view of the genital organs, the actinostome, and the oral tentacles . 151 



232. Magnified profile view of adult BouGAiNViLLiA SUPERCILIARIS . . . . 153 



233. Hydromedusarium of Bougainvilha ......... 154 



234. Young elongated Medusa 154 



235. Somewhat more advanced than Fig. 234 ........ 154 



236. Appearance a short time before separating fi'om the stem . . . . .154 



237. Same as Fig. 236, expanded . . l.'>4 



238. Young Bougainvilha, immediately after its liberation from the Hydromedusarium 154 



239. Magnified view of sensitive bulb ......... 155 



240. Tentacular bulb, with young tentacles 155 



241. Adult Margelis carolinensis, seen in profile, magnified .... 156 



242. Digestive cavity, genital pouches, oral tentacles, and actinostome . . . .156 



243. Sensitive bulb at base of one of the chymiferous tubes 156 



244. Young Margelis, having only two marginal tentacles at the base of each chymif- 



erous tube ............ 157 



245. Young Margelis, seen from the abactinal pole, in condition of Fig. 244 . . . 157 



246. Proboscis of a Margelis, having already six tentacles at each sensitive bulb . 158 



247. Hydrarium, greatly reduced in size ......... 158 



248. Magnified heads and Medusa; buds of Margelis carolinensis .... 158 



249. Female Medusse buds of Eudendrium dispar, in different stages of developtaent 159 



250. Part of a male colony of Eudendrium tenue, magnified .... 160 



251. Adult male of Lizzia grata, seen in profile, magnified 161 



252. Quarter-disk of a young Lizzia 161 



253. Magnified view of sensitive bulb 161 



254. Proboscis of male Lizzia, magnified ......... 162 



255. One of the four lobes of the actinostome, seen from above 162 



256. Actinal view of proboscis of young Lizzia ....... 162 



257. Actinal view of proboscis of an older specimen . . . . . . .162 



258. Abactinal view of Fig. 257, somewhat less magnified 162 



259. Adult Dysmorphosa fulgurans, magnified 163 



260. Magnified proboscis, showing young Medusic of the second and third generations 163 



261. Turris vesicaria, natural size, seen in profile 165 



262. The same, with the bell contracted 165 



263. A portion of the disk, seen from the abactinal pole 165 



