LIST OF THE WOOD-CUTS. 



xui 



Magnifiovl profile view of genital orrjans and actinostome 165 



IMagnifieil view of a part of a ohyniilL'ious tube ...... 166 



Base of one of the chvmiferous tubes, anil part of the circular tube . . .166 



One of the tentacles, in a profile view 166 



One of the tentacles, seen from the abactinal pole . . . . . .166 



Young TuRRiTDPSis NUTnicuLA, with four marginal tentacles . . . 167 

 Somewhat more advanced, having sixteen tentacles ...... 167 



Stomotoc.\ .\tr.\, somewliat magnified, seen in profile 169 



Magnified view of genital organs 169 



Stomotoca atra. ............ 169 



Clava leptostyla. (L. Agassiz.) 170 



Young Wii-LIA ORNATA, having only the second set of tentacles developed . 171 



Young A\'illia, nearly in the stage of Fig. 276, seen from the abactinal pole . .171 

 Profile view of a young Willia . ......... 172 



Part of the circular tube . . . . . . . . . . .172 



View of ovary of Fig. 276 172 



Same as Fig. 278, seen from the abactinal pole 172 



Pkoboscid.\ctyla flavicirrata 173 



Actinostome and digestive cavity . . . . . . . . . .173 



Portion of disk to show mode of branching of ehymiferous tubes, and tubes con- 

 taining lasso-cells, as in AVillia . . . . . . . . . 1 74 



Adult CoRYXE MiRAiiiLis, seen in profile. (L. Agassiz.) . . . . 175 



Coryne, witli proboscis contracted. (L. Agassiz.) . . . . . .175 



Coryne, with expanded proboscis. (L. Agassiz.) . . . . . . 175 



Cluster of llyiharia of Coryne mirabilis. (L. Agassiz.) . . . . .176 



Young Ilydrarium of Coryne. (L. Agassiz.) 176 



Magnified view of head, with Medusae buds attached. (L. Agassiz.) . . .176 



Coryne rosaria, natural size 177 



Hydromcdusarium of Syxdictyon reticulatum, greatly magnified . . .178 

 Syndict}on reticulatum, immediately after it has become freed from the Hydro- 

 mcdusarium, in profile . . . . . . . . . .178 



One of the tentacles of Fig. 291, magnified 178 



Sensitive bulb of Fig. 291 178 



Digestive cavity of Fig. 291 178 



Fig. 291, from actinal pole 178 



Fig. 291, from abactinal pole .......... 179 



Part of net-work of lasso-cells of surface of spherosome . . . . .179 



Adult Medusa in a natural attitude ......... 180 



Same Medusa (Fig. 298) with the tentacles contracted 180 



Actinostome of ailult Medusa .......... 180 



Young Dipurena conic.a 181 



Digestive cavity of a young Dipurena conica ....... 181 



Tentacle of Dipurena conica . . . . . . . . . .182 



Digestive cavity of a Medusa in which the constriction has already separated tlie 



upper and lower halves . . . . . . . . . .182 



Adult Dipurena conica, in wliicli the two digestive cavities are widely separated 182 



Profile view of lialf a young Gemmaria gemmosa 184 



Profile view of Gemmaria cladopiiora, magnified 184 



Quarter-disk of same, seen from the abactinal pole . . . . . .185 



Actinostome of Gemmaria, enlarged . . . . . . . . 185 



Cluster of lasso-cells of the marginal tentacles . . . . . . .185 



Fertile Hydra of Pexnaria tiarella 187 



Medusa distended by eggs . . . . . . . . . . .187 



Profile view of Me<lusa of Pennaria tiarella ....... 187 



Different attitude of the Me<lusa, seen from the actinal pole . .... 188 



Fig. 313, seen from the abactinal pole 188 



EuPHYSA virgulata, seen in profile 190 



Magnified proboscis of Fig. 316 ......... 190 



Actinal view of Eupliysa virgulata ......... 190 



