[47] ALBATROSS EXPLORATIONS. 540 



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-papillte at the end of each jaw, 

 and one smaller spiniform one oii 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 small, rounded; side month- 

 shields rather broad. Mouth- papillae, 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 mouth-slits, as in A. Otteri. 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'"™. Eesembles 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 Goesi (Ljung.) Lym. 

 B. range, 14 fathoms, station 2114, off Cape Hatteras. 



Amphiura tenuispina (Ljung.) Lyman. Fig. 55. 

 B. range, 115 to 487 fathoms (407 fathoms, 1883). Not uncommon. 



Amphilepis N'orvegica (Ljung.) Lym. 

 B. range, 547 to 1,608 fathoms, 1882, 1883. Common and large. 



J Ophiocnida olivacea Lyman. 1869. 



B. range, 63 to 192 fathoms (131 fathoms, 1883). Sometimes abun- 

 dant locally. 



Ophioscolex glacialis Mtiller & Troschel. 

 B. range, 101 to 1,000 fathoms, 1883. Common. 



