[47] ALBATROSS EXPLORATIONS. 549 
ones, mostly a little bent toward the end, with the tip slightly hooked. 
Two flat, blunt tentacle-scales, which are very small and indistinct in 
young specimens; a pair of stout mouth-papille at the end of each jaw, 
and one smaller spiniform one on each side, a little farther back; a 
stout, erect, spiniform tentacle-papilla at the outer end of the mouth- 
slit on each side. 
Amphiura fragilis Verrill, sp. nov. 
B. range, 239 to 1,467 fathoms. 
Disk, five-lobed, covered above with small, delicate scales, naked 
beneath; radial shields, pear-seed-shaped, slightly divergent, the inner 
ends separated by a narrow row of scales. Arms long and slender; 
Arm-spines, four or five near the disk, usually four along the middle 
-and three toward the tip of the arms; they are subequal in length, the 
upper one a little longer and more enlarged toward the base, the tips ob- 
tuse and minutely roughened or spinulose on one side. Tentacle-scale 
absent or rudimentary. Mouth-shields smail, rounded; side mouth- 
shields rather broad. Mouth-papille, four to each angle; a pair of 
large, stout, blunt ones stand at the end of the jaw, and a much smaller, 
spiniform, acute one a little farther back on each side; there is also an 
acute, spiniform, erect papilla outside of the mouth-tentacle, opposite 
the outer angle of the mouti-slits, as in A. Ottert. Ventral arm-plates, 
subquadrate, longer than broad, with the outer angles rounded and the 
inner ones truncated; farther out they become shorter and somewhat 
five-sided, with the outer margin rounded and the inner corners so 
much truncated as to form a median angle. Diameter of disk of an 
ordinary specimen, 5™™; length of arms, about 30™. Resembles the 
young of A. Otteri, but differs in lacking tentacle-scales and in having 
the disk naked below, and in the arm-spines, which are not curved. 
Amphiura macilenta Verrill. 1882. 
B. range, 53 to 115 fathoms (70 fathoms, 1883). Very abundant 
locally, in moderate depths, as far south as off Cape Hatteras. 
Amphiura Goési (Ljung.) Lym. 
B. range, 14 fathoms, station 2114, off Cape Hatteras. . 
-Amphiura tenuispina (Liung.) Lyman. Fig. 55. 
B. range, 115 to 487 fathoms (407 fathoms, 1883). Not uncommon. 
Amphilepis Norvegica (Ljung.) Lyin. 
B. range, 547 to 1,608 fathoms, 1882, 1883. Common and large. 
Ophiocnida olivacea Lyman. 1869. 
B. range, 63 to 192 fathoms (131 fathoms, 1883). Sometimes abun- 
dant locally. 
Ophioscolex glacialis Miller & Troschel. 
B. range, 101 to 1,000 fathoms, 1883. Common. 
