548 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [46] 
Ophiacantha gracilis Verrill, sp. nov. 
B. range, 220 to 858 fathoms, mostly off Nova Scotia, on Gorgonians. 
A small, delicate species, with long, slender, attenuated arms. Disk 
round and full, covered with relatively large, easily visible scales, each 
of which bears a rather large and high columnar spinule, a little en- 
larged at the summit and terminated by five or six or more, slender, 
sharp, divergent. points. Arm-spines along most of the length of the 
arm, four or five, short for the genus, being about half as long as an 
arm-joint; the small upper one is tapered; the lower ones are stouter, 
rough, blunt, and hooked at the end; the lowest is largest and most 
hooked ; on the two joints next to the disk the five spines are much 
longer, very slender, tapered, acute; the two upper ones twice as long 
as an arm-joint. Tentacle-scale, small, spiniform; mouth-papille few, 
about three on each side of a jaw, besides a larger, odd, terminal one ; 
the lateral ones are small, spiniform; the two outer ones stand a little 
back from the slit, like tentacle-papille ; mouth-shields small, narrow, 
rounded without; acute, angular within; side shields, large, angular; 
ventral arm plates widely separated, elongated, rounded on the outer 
edge; the inner end with an angular median point. Diameter of disk, 
3.5"; length of arms, about .22™, Probably young, but very unlike 
the young of any of our other species. 
Ophiolebes Acanelle Verrill, Amer. Journ. Sci., February, 1885. 
Bb. range, 91 to 122 fathoms, off Nova Scotia. 
Disk rounded, abil covered above and below with rather large 
globular or capitate Stumps, minutely spinulose at theend. Arms short: 
Arm-spines at base of arms, six or seven, short, obtuse, rough, with 
small spinules; the four lower are shorter and stouter than the upper 
ones, with a blunt or clavate, rough, thorny tip; the upper ones are 
more cylindrical, but mostly blunt, shorter than the breadth of the arm- 
joint; the lower groups of three or four spines extend nearly to the 
mouth-angles. Mouth-papille, three or four on each side, small, nearly 
equal, rounded, obtuse. Diameter of disk, 6™". Station 2071, on Para- 
muricea borealis, in 113 to 122 fathoms, off Nova Scotia. 
Ophiopholis aculeata Gray. 
B. range, shore to 1,000 fathoms (18 to 1,000 fathoms, 1883). Very, 
common and widely diffused as far south as off Cape Hatteras. 
Amphiura Otteri Ljungmann (?); Lyman. 
b. range, 182 to 1,608 fathoms (487 to 1,608 fathoms, 1883). Not 
uncommon, 
In this species the disk is covered with small scales, above and below; 
the radial shields are elongated, wedge-shaped, with a narrow group 
of scales between their divergent and tapered inner ends. The arms 
are very long and rather slender, flattened, usually with about six 
spines toward the base, but in large specimens there may be as many 
as eight; they are moderately long, tapered, and, except the upper 
