82 THE VOYAGE OF H.M.S. CHALLENGER. 
Stenohelia, Kent (revised by Moseley). 
Stenohelia profunda, Moseley (Pl. XII. figs. 1-4). 
Coenosteum very delicate, with fine granular surface. Tubular gastropores very long 
in proportion to the width of their mouths, and extremely deep. From twelve to six- 
teen dactylopores in each system. Dactylopores very narrow and slit-like. Ampullze in 
the angles of the junctions of the branches, often projecting far, and somewhat thorn- 
like in aspect, having the appearance of being rudimentary branches, converted to several 
purposes. In some specimens, possibly males, the ampulla are covered all over with 
pointed tubercles. 
Extreme height of the ccenosteum about 25 mm, 
Station 23. Off St Thomas, Danish West Indies. 450 fathoms. 
Station 191. Off the Kermadec Islands, lat. 28° 33’ S., long. 197° 50’ W. 600 
fathoms. 
Conopora, Moseley. 
Conopora tenuis, Moseley (Pl. XII. figs. 5, a, b, 6). 
With character of the genus (p. 97 of the present memoir). Dactylopores in each 
system from twelve to fifteen in number. 
Station 170. Off the Kermadeec Islands. 520 fathoms. 
Astylus, Moseley. 
Astylus subviridis, Moseley. 
One small specimen only. 
Station 214. Off the Meangis Islands. 500 fathoms. 
Cryptohelia, M.-Edw. and H. 
Cryptohelia pudica, M.-Edw. and H. 
A considerable quantity of specimens was obtained from both these localities. 
The East Indian specimens appear to differ almost constantly from the Atlantic ones in 
having the margin of their cyclo-systems thin, laminar, and overhanging the exterior. In 
the Atlantic specimens it is rounded inwards. The East Indian specimens thus seem to 
possess the peculiarity which Milne-Edwards and Haime elevated into a generic one 
in their Endohelia, I do not refer the forms to separate species in the absence of 
knowledge of the soft parts of the Eastern form. 
