82 



THREE CRUISES OF THE " BLAKE. 



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

 cea. (Figs. 333, 333 a.) 



Fig. • '.'■'>■>. — Cellepora margari- 

 tacea. ? . 



Fig. 333 a. — Cellepora margari- 

 tacea. Magnified. (Smitt.) 



Among the Bryozoa often found in large communities, form- 

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



Fig. 334. — Biflustra maerodon. f . Fig. 335. — Porina subsulcata. f . 



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



Fig. 336. — Retepora reticulata. \- 



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



