798 
THE VOYAGE OF H.M.S. CHALLENGER. 
“ Probably the most beautiful of all Madreporarian skeletons is that of Lcptopcnus 
hypoccdus (figs. 289, 290), which was trawled not far from the island of Juan Fernandez 
Fig. 288. — Stephanophyllia complicate., Moseley ; x 3. From 129 fathoms off the Ki Islands. 
from 21 GO fathoms. The coral, together with another referred to the same genus, Lcpto- 
Fig. 289 . — Leptopenus hypocortus , Moseley. Oft' Valparaiso, 2160 fathoms. View from the side. 
penus discus, has no living ally nearer than Stephan opliyllia , and no extinct ally of it is 
known at all. Very possibly this may lie due to the fact that the representatives of 
