CHARACTERISTIC DEEP-SEA TYPES. CORALS. 151 



mopliyllum, crlstu-gaUl came up attached to the stem of a Prim- 



Fig. 409.— DesmophyiiuraRiisei. \. Fig. 470. — Desmophyllum solidura. 2 



( Pourtales. ) ( Pourtalfes. ) 



noa. Rkkotrochus fragilis (Fig. 471) was obtained in about 



Fig. 471. — Rhizotrochus fragilis. |. 

 (Pourtales. ) 



Fig. 472. — Lophohelia prolif era. \. 

 (Pourtales.) 



forty different casts along the Florida Reef, in depths varying 

 from 49 to 324 fathoms. It was most abundant between 100 

 and 200 fathoms. The color of the polyp is greenish or pale 

 brick-red. Lophohelia prolif era (Fig. 472) has a very exten- 



