800 



ALLAX HANCOCK PACIFIC EXPEDITIONS 



VOL. 14 



PLATE 71 



Crisidia cornuta (L.), part of zoariiim showing mode of 

 brandling and position of spine-like processes. 

 Ricrisia ed^wardsiana d'Orbigny, with ovicell and spine- 

 like processes. 



Crista onidcntalis Trask, shn\viiig mode of branching and 

 normal form of ovicell. 



The same, distorted ovicell due to curved internode. 

 The same, pointed tip of terminal internode, often present. 

 Crista operculata Robertson, frontal view of ovicell and 

 ooeciostome. 



The same, sketch of side view showing the cap or "oper- 

 culum" above the ooeciopore. 



Crisia pugeii Robertson, frontal view of ovicell and, at 

 left, a sketch of the side view with bent ooeciostome. 

 Crisia elongata Milne-Edwards, frontal view with short, 

 \vide expansion of the ovicell. 



Crisia ehiirnea (L. ), with short, trans\erse ooeciostome. 

 Tiibulipora flextiosa (Pourtales), a portion of a branch 

 with short ovicell and ooeciostome distal to a peristome. 



