798 
THE VOYAGE OF TI.M.S. CHALLENGER. 
“Probably the most beautiful of. all Madreporarian skeletons is that of Leptopenus 
hypoccelus (figs. 289, 290), which was trawled not far from the island of Juan Fernandez 
Fig. 288 , — Stephanophyllia complicata, Moseley ; x 3, From 129 fathoms off the Ki Islands. 
from 2160 fathoms. The coral, together with another referred to the same genus, Lcpto- 
Fig. 289 . — Leptopenus hypoccelus, Moseley. Off Valparaiso, 2160 fathoms. View from the side. 
penus discus, has no living ally nearer than Stephanophyllia, and no extinct ally of it is 
known at all. Very possibly this may be due to the fact that the representatives of 
