544 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [42] 
Ophioglypha Ijungmani Lyman. 1878 (%). 
B. range, 843 to 1,467 fathoms. Common. 
This species is very closely allied to the preceding, and, like it, usually 
has, when perfect, a few small spines scattered on the disk ; but the disk 
is much thicker, and the arms higher at base. The mouth-shields are 
larger and longer, emarginate laterally, disk scales coarser; the jaws 
more acute; mouth-papille, four or five, short, flat rounded, except the 
inner one. 
Ophiomusium Lymani W. Thomson. 
B. range, 238 to 2,033 fathoms (640 to 2,033 fathoms, 1883). Abun- 
dant and large in many localities. 
Ophiomusium armigerum Lyman. 1878. 
B. range, 1,731 to 2,369 fathoms, 1883. Abundant locally. 
Ophiochiton grandis Verrill. 1884. 
B. range, 888 fathoms, 1883. Rare. 
Ophiomitra spinea Verrill. 1885. § 
B. range, 2,038 fathoms, station 2,035, 1883. Two specimens. 
A large species resembling QO. valida. Arms five, long and stout; 
disk five-lobed, indented between the arms; radial shields moder- 
ately large, irregularly ovate, with a small notch in the broad outer 
end; their inner ends are separated by a wedge of small scales, but the 
outer ends are in contact, or nearly so; disk-scales rather small, un- 
equal, bearing small, low, conical spinules or granules; a few granules 
on the outer end of radial shields and bases of the arms. Arm-spines, 
eight or nine at base of arms, long, slender, acute, sharply thorny, aris- 
ing from prominent side plates; the middle spines are the largest and 
roughest; the rows do not meet above at base of arms. Mouth-shields 
rhombic, with incurved lateral margins; the inner angle acute, the 
outer one obtuse or rounded; side mouth-shields thickened, crescent- ' 
shaped; tentacle-scale rather large, those at base of arm wide, flat, and 
obtuse; farther out lanceolate and rather acute. Mouth-papille nu- 
merous, unequal, rather irregular and crowded at the outer mouth-angles, 
where they form two or more rows; in the largest example there are 
eighteen to twenty, or more, in each angle; in the smaller one about 
twelve; they are mostly rather slender, spiniform, or papilliform, the 
outermost one wider and more flattened. The larger specimen has the 
disk 14™™ in diameter; the smaller one, 11™™. 
Ophiacantha bidentata (Retz.) Liung.; Lyman (pars) “Challenger” Ophiu- 
roidea. 
Ophiacantha spinulosa (M. and Tr.) Lyman, Illus. Catalogue Mus. Comp. Zoology. 
B. range, 40 to 351 fathoms (101 to 351 fathoms, 1883), Common north- 
ward, in moderate depths, from Massachusetts Bay to Greenland. 
The form here intended is the same as that described and figured by 
