. Bulletin - United States National Museum. Science. 234 BULLETIN 75, UNITED STATES NATIONAL MUSEUM. plates moderate, meeting both above and below; each i)late carries half a dozen slender, sharp spines, the uppermost longest and exceed- ing three joints; the two upper spines are smooth but the lower ones are rough near the tip. Tentacle scales single, small, spiniform, and sharp. Color (dried from alcohol), whitish, yellowish, or grayish. Localities.—Albatross station 2859, off Alaska, lat. 55° 20' N.; long. 136° 20' W., 1,569 fathoms, gray ooze, bottom temperature °,183 specimens; statio
. Bulletin - United States National Museum. Science. 234 BULLETIN 75, UNITED STATES NATIONAL MUSEUM. plates moderate, meeting both above and below; each i)late carries half a dozen slender, sharp spines, the uppermost longest and exceed- ing three joints; the two upper spines are smooth but the lower ones are rough near the tip. Tentacle scales single, small, spiniform, and sharp. Color (dried from alcohol), whitish, yellowish, or grayish. Localities.—Albatross station 2859, off Alaska, lat. 55° 20' N.; long. 136° 20' W., 1,569 fathoms, gray ooze, bottom temperature °,183 specimens; station 2860, off British Columbia, lat. 51° 23' N.; long. 130° 34' W., 876 fathoms, green mud, bottom temperature °, 11 specimens; station 3603, Bering Sea, lat. 55° 23' N.; long. 170° 31' W., 1,771 fathoms, brown ooze, bottom temperature °, 3 specimens; station. 4761, off Shumagin Is- lands, lat. 53° 57' 30" N.; long. 159° 31' W., 1,973 fathoms, blue clay, bottom tempera ture 35°, 14 specimens; station 4766, Bering Sea, lat. 52° 38' N.; long. 174° 49'W., 1,766 fathoms, character of bottom and bottom temperature not ob- served, 117 specimens. Bathymetrical range, 876 to 1,973. fathoms. Temperature range, ° to °. Three hundred and twenty- eight specimens. Type.—C at. No. 25541, , from station 2859. Although this species has no very distinctive marks, it appears to be different from any other known member of Ophiacanthi. The form and position of the adoral plates are unfortunately not abso- lutely reliable characters, but taken in connection with others may be useful. The disk covering, the upper arm plates, the arm spines, and the tentacle scales are the most important characters in that connection. The species seems to be a typically abyssal ophiuran and it is rather remarkable that it is so little differentiated from more shallow-water species. Fig. 110.—Ophiacantha bathybia. X 4. a, from above; h, FROM below; c, side view of two a
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