82 



THREE CRUISES OF THE '" BLAKE. 



in depths ranging from 15 to nearly 300 fathoms, G. margarita- 

 cea. (Figs. 333, 333 a.) 



Fig." 333. — Cellepora iiiarg-ari- 



tacea. ?. 



Fig-. 333 a. — Cellepora margari- 

 tacea. Magnified. (Sniitt) 



Among the Bryozoa often found in large communities, form- 

 ing lawns of delicate hmestone plants, may be specially men- 



Fig-. 334. — Biflustra raaerodon. ^. Fig. 33.5. — Porina subsulcata. f- 



tioned Biflustra macrodon (Fig. 334), Porina subsulcata (Fig. 



.e 





Fig. 336. — Retepora reticulata. \. 



335), and Retepora reticulata. (Fig. 336.) 



