800 ALLAX HAXCOCK PACIFIC EXPEDITIOXS VOL. 14 



PLATE 71 



Fig. 1. Crisiciia rnrnuta (L.), part of zoariiim showing mode of 

 branching and position of spine-like processes. 



F'ig. 2. Birrisia edivardsianu d'Orbigny, \vith oviceil and spine- 

 like processes. 



Fig. 3. Crista occidentalis Trask, showing mode of branching and 

 normal form of oviceil. 



Fig. 4. The same, distorted oviceil due to curved internode. 



Fig. 5. The same, pointed tip of terminal internode, often present. 



Fig. 6. Crista operculata Robertson, frontal view of oviceil and 

 ooeciostome. 



Fig. 7. The same, sketch of side view showing the cap or "oper- 

 culum" above the ooeciopore. 



Fig. 8. Crisia pugeti Robertson, frontal view of oviceil and, at 

 left, a sketch of the side view with betit ooecif'stome. 



Fig. 9. Crisia elongata Milne-Edwards, frontal view with short, 

 wide expansion of the oviceil. 



Fig. 10. Crisia ehurnea (L.), with short, transverse ooeciostome. 



Fig. 11. Tiihulipora flextiosa (Pourtales), a portion of a branch 

 with short oviceil and ooeciostome distal to a peristome. 



