FURTHER DIAGNOSES AND DESCRIPTIONS 

 OF NEW SPECIES OF CORALS 



FROM THE "SIBOGA-EXPEDITION" 



A. ALCOCK, M.B., LL.D., F.E.S., 



Superintendent of the Indian Museum and Professor of Zoology and 

 Coruparative Anatorny in the Medical College of Calcutta. 



Fam. TURBINOLlDvE. 



FhloBOcyathns n. n. 



Pleurocyathus Moseley {nee Keferstein) Challenger Deepsea Madre- 

 poraria p. 159 (nom. preeoce.). 



1. Plüceocyatlius hospes, n. sp. 



Corallum conical, covered with a thin, dark-brown, speckled 

 epitheca, beneath whicli numerous fine wrinkles aneï fine discrete 

 granulation, as well as several bold growth-rings, are visible. 

 No distinct costae exist. 



The calicular margin is circular and the epitheca is folded over 

 it, so that the septa are sunk below it. 



The calicular fossa is deep and like the septa is of a dark 

 brown colour, the edges of the septa and the tip of the columella 

 being nearly black. The septa do riot project far ioto the fossa, 

 and appear less salient than they really are owing to the presence 



