180 



DlOTTOSPONGID^. 



character both genus and species are founded. Sufficient is also known 



of the shape of the body to permit its recognition from the accompanying 



description. 



Griphodictya epiphanes, sp, nov. 



Plate lv, Fig. 6. 



SpoTfOE slender, originally subcylindrical or with the tube gently 



expanding to both extremities, the incurvature of the vertical Avails being a 



FianBE es. Spicules of Qriphodictya epiphanes, x266. 1-1, umbels of different form ; 5, ozyhezaster with the 

 arms divided Into throe prongs each ; 6, 7, 8, oxyhexasters with the arms of the horizontal axes unmodified and the 

 others variously branched ; 9, oxyhexaster with four prongs on two of the arms and three on the other two-, 

 10, simple hexact or pentact ; 11, fragments of echlnate spicules. (J. M!. 0.) 



very broad arc without interruption throughout its extent. The base of the 

 sponge terminates abruptly in a broadly undulated margin by which attach- 

 ment was evidently effected or aided, as in the case of the periloph of Phkao 



