74 VERRILL, SYNOPSIS OF 



protrudes and retracts the mouth at will, therefore the 

 genus, Melactis E. and H., which was based on the prom- 

 inent mouth of O. vas and C globulosa, as figured by 

 Quoy and Gaimard, must be dropped, unless sustained by 

 other characters at present unknown, 



CORYNACTIS ANNUL AT A Vcrrill. 



Melactis annulata Verrill, these Proceedings, Vol. V, p. 50, PI. 1, 

 figs. 8, 8a, 1866. 



Base expanded, entire or lobed. Column smooth, at 

 times short cylindrical, in full expansion usually smallest 

 in the middle, gradually enlarging both to the base, and 

 summit. Disk in full expansion wider than the column, 

 sometimes convex, at other times concave. Mouth small, 

 rounded, either depressed or raised on a prominent cone, 

 the lips with many radiating folds. Tentacles occupying 

 the outer half of the disk, the inner ones short, tubercu- 

 liform, scattered, the outer ones much larger, somewhat 

 elongated, the pedicel nearly as thick as the slightly en- 

 larged, rounded end. Height, in expansion, .4 of an inch ; 

 diameter of disk .32 of an inch. Color of column light 

 rose, with a narrow ring of bright vermilion just below 

 the tentacles, at the margin. Mouth, disk, and tentacles 

 nearly white, tinged with rose. 



False Bay, Cape of Good Hope, abundant on stones 

 and shells on rocky bottoms, in fifteen to twenty-five fath- 

 oms, October, 1853. Dr. Wm. Stimpson. 



