MUSEUM OF COMPARATIVE ZOOLOGY. 227 
Amphiura semiermis Lym. 
Amphiura semiermis, Bull. Mus. Comp. Zool. Vol. I. No. 10, p. 832. 1869. 
Station 44, 539 fathoms, 4 specimens. 
Ophiocnida abnormis sp. nov. 
Plate II. Figs. 37-39. 
Special. Marks. — A. wide mouth-papilla, oceupying nearly the whole length 
of the mouth-frame, on either side, with a group of four tooth-like papille at 
the apex. 
Description of an Individual (Station 45). — Diameter of disk 4mm, Length 
of arm about 40 mm. Width of arm without spines 1 mm, <A very wide 
mouth-papilla on either side, oceupying nearly the whole length of the angle, 
and a group of four tooth-like papilla at the apex. Mouth-shield wide heart- 
shape, with the angle inward. Side mouth-shields short and wide, somewhat 
swollen, broader without, tapering inward, where they nearly or quite meet. 
Under arm-plates pentagonal, broader than long, with inner angle more or less 
truncated, and outer edge géntly curved. Side arm-plates small, slightly flar- 
ing without, and just meeting below ; separated above by the upper arm- 
plates, which are broad fan-shape, with an angle inward. Disk thin, slightly 
puffed, covered above and below with small overlapping scales, and beset above 
with a few blunt spines. Radial shields long, pear-seed shape, touching with- 
out, separated within by a wedge of scales, Three short, stout, blunt, tapering 
arm-spines placed close together. Two minute tentacle-scales on the basal 
joints ; only one beyond. Color in alcohol, pale straw. 
Station 45, 101 fathoms, 1 specimen. 
Ophioenida olivacea Lym. 
Ophiocnida olivacea, Bull. Mus. Comp. Zoöl. Vol. I. No. 10, p. 340. 1869, III. Catal. 
Mus. Comp. Zoól. VI. Pl. I. Figs. 7, 8. 
Bigsbee, off Havana, 119 fathoms, 1 specimen. 
Ophiopsila fulva sp. nov. 
Plate II. Figs. 25 - 27. 
Special Marks. — Six or eight sharp mouth-papille to each angle. Long, 
very narrow, separated radial shields. Ten or twelve flattened arm-spines. 
Description of an Individual (off Havana). — Diameter of disk 7.5 mm. 
Width of arm without spines 1.8 mm. There are two or three long, flat, 
tapering mouth-papilli on either side of the mouth-angle, with two or three 
shorter ones at the apex of jaw. Mouth-shield occupying almost the whole 
mouth-angle, broad, swollen, heart-shaped, with a wide angle within. Side 
mouth-shields rudimentary, situated close to the outer corners. Under arm- 
plates narrow, four-sided, slightly swollen on the inner margin, lateral sides 
straight, and a small notch on the outer edge. Side arm-plates curved on their 
outer edge, meeting neither above nor below. Upper arm-plates very small, 
longer than wide, and rounded. Disk slightly puffed and wrinkled, with 
