. Bulletin - United States National Museum. Science. 94 BULLETIN 75, UNITED STATES NATIONAL MUSEUM. pores of arm large, round, with a single, big, spinelike tentacle scale on proximal side. Color (dried from alcohol), pale gray. Locality.—Albatross station 4765, Aleutian Islands, lat. 53° 12' N.; long. 171° 37'W., 1,217 fathoms, fine black sand, bottom temperature °, 8 specimens. Type.—Cut. No. 25534, , from station 4765. The smallest specimen has the disk only about 3 mm. in diameter but in practically all of its characters it agrees with the others, except that there seems to be
. Bulletin - United States National Museum. Science. 94 BULLETIN 75, UNITED STATES NATIONAL MUSEUM. pores of arm large, round, with a single, big, spinelike tentacle scale on proximal side. Color (dried from alcohol), pale gray. Locality.—Albatross station 4765, Aleutian Islands, lat. 53° 12' N.; long. 171° 37'W., 1,217 fathoms, fine black sand, bottom temperature °, 8 specimens. Type.—Cut. No. 25534, , from station 4765. The smallest specimen has the disk only about 3 mm. in diameter but in practically all of its characters it agrees with the others, except that there seems to be a well-developed second upper arm plate, which is not present in the type specimen. There is no danger that this species will be confused with any other ophiuran, even if these specimens prove to be very immature. OPHIOTROCHUS LONGISPINUS, new Disk 6 mm, in diameter; arms about 30 mm. long. Disk very flat, thin, covered by radial shields and about twenty-six large plates (sixprimaries, five other radials, and three plates in each interra- dius) regularly arranged and surrounded by nu- merous much smaller scales; along margin of disk are numerous small granules. Radial shields longer than broad, rounded at both ends, separated by a narrow line of scales or barely in contact. Upper arm plates triangular, or tet- ragonal with outer end rounded, very minute but apparently present to very tip of arm. In- terbrachial spaces below C covered with scales, Fig. 33.—OPHIOTROCHUS longispinus. xs. a, from above; 6, wliich are more or less FROM below; c, side view of three arm joints near disk. 11 • n concealed, especially near margin, by coarse granules. Oral shields not very large, triangular, with outer corners more or less rounded. Adoral plates very long, a Longus, signifying long, and spinus, signifying spine, in reference to the very long arm spines of the first Please note that these images are extracted from scanned page images that may have been digital
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