82 
in depths ranging from 15 to nearly 300 fathoms, C. margarita- 
cea. (Figs. 333, 333 a.) 
THREE CRUISES OF THE “BLAKE.” 
Fig. 333. — Cellepora margari- Fig. 333 a. — Cellepora margari- 
tacea. 2, 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 macrodon. 2. Fig. 335. — Porina subsulcata. 2. 
tioned Biflustra macrodon (Fig. 394), Porina subsulcata (Fig. 
Fig. 336. — Retepora reticulata. 4. 
335), and Retepora reticulata. (Fig. 336.) 
