582 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
‘Calyces low truncated cones. The polyp is greatly constricted just 
below the collar, and above it the tentacles arise in a perpendicular 
group, the outline of the mass of tentacles being a truncated oval 
when viewed laterally. Height of polyp and calyx about 2 mm. 
Spicules, small warty spindles disposed transversely around the 
bases of the calyces, and in eight double rows arranged en chevron 
in their walls. Those of the collar are more slender and curved at 
the ends; while those of the tentacles are much smaller, more slender, 
arranged en chevron basally, but distally they are disposed in numer- 
ous more nearly parallel longitudinal rows. The spicules of the 
cortex are sometimes scale-like, but are usually stout warty spindles, 
sometimes very irregular in their disposition, at others longitudinally 
disposed. 
Color.—Stem and branches, where bare, a dark rich brown; polyps 
a much lighter yellowish brown. When dried, the spicules of the 
cortex give the colony a silvery appearance. 
This is one of the largest and handsomest species 1n the collection. 
Type.—Cat. No. 25383, U.S.N.M., Albatross Station 4178. Near 
Niihau Island, 319-378 fathoms. 
Genus CLEMATISSA Wright and Studer. 
Termination of branch always formed by a polyp. Calyces bluntly 
conical, arranged in short spirals. Spicules exceedingly varied in 
shape, those in calyx walls arranged irregularly, those on tentacle 
bases en chevron. 
% Las 
CLEMATISSA ALBA, new species. 
Plate XLIV, fig. 4; plate XLVIII, fig. 4. 
Colony incomplete, about 22 mm. high, consisting of a sinuous 
stem giving off two large unequal branches about 50 mm. apart. The 
branches and main stem are equal in diameter and similar in appear- 
ance, each ending in an irregular cluster of polyps. The calyces are 
disposed in an irregular spiral, project at a right angle from the 
stem and branches, although their distal ends may be inclined either 
toward the distal or proximal end of the colony; unusually large in 
size, cylindrical, sometimes attaining a height of 54 mm. to the top 
of the operculum, and a diameter of 3 mm. across the top of the 
ealycular wall. The tentacular part of the polyp is abruptly con- 
stricted from the body, and is quite high; the basal half of the ten- 
tacles being held vertically, and the distal half bent abruptly over 
the oral disc. 
The spicules are warty spindles, sometimes flattened and branched. 
Those of the calyx walls are proportionally small and inclined in all 
