NOVA SCOTIAN ECHINODERMATA.—HONEYMAN. 259 
Halifax in 1877, Mr. Verrill identified it and labelled it Molpadia 
oolitica. 
Danielssen and Koren, in Holothurioidea of the Norwegian 
North Atlantic Expedition, 1876-1878, include this Holothurian 
in their genus J'rochostoma—Gr. Trochos, a wheel, and Stomu, 
a mouth, of which T'rochostoma Thomsoni is the type. 
