. Bulletin - United States National Museum. Science. NORTH PACIFIC OPHIURANS IN NATIONAL MUSEUM CLARK. 143 fathoms, mud, bottom temperature °, 113 specimens; station 4761, off Alaska, lat. 53° 57'30"N.; long. 159° 31'W., 1,973 fathoms, blue clay, bottom temperature 35°, 3 specimens; station 4766, Bering Sea, lat. 52° 38' N.; long. 174° 49' W., 1,766 fathoms, bottom tem- perature ? (about 35°), 13 specimens; station 5087, Sagami Bay, lat. 35° 9' 40" N.; long. 139° 19' 5" E., 614 fathoms, green mud, bottom temperature °, 1 specimen; locality ?, 21 specimens. Bathymet- rica
. Bulletin - United States National Museum. Science. NORTH PACIFIC OPHIURANS IN NATIONAL MUSEUM CLARK. 143 fathoms, mud, bottom temperature °, 113 specimens; station 4761, off Alaska, lat. 53° 57'30"N.; long. 159° 31'W., 1,973 fathoms, blue clay, bottom temperature 35°, 3 specimens; station 4766, Bering Sea, lat. 52° 38' N.; long. 174° 49' W., 1,766 fathoms, bottom tem- perature ? (about 35°), 13 specimens; station 5087, Sagami Bay, lat. 35° 9' 40" N.; long. 139° 19' 5" E., 614 fathoms, green mud, bottom temperature °, 1 specimen; locality ?, 21 specimens. Bathymet- rical range, 60 to 1,973 fathoms. Temperature range, ° to 35°. One hundred and sixty-two specimens. Tyj)e.—Csit. No. 25594, , from station'2859. This species will be easily recognized by the combination of naked interbrachial spaces, long radial shields, one tentacle scale, three arm. Fig. 50.—Amphiura leptodoma. X 15. a, from above; 6, from below; c, side view of two arm JOINTS near disk. spines, and spine-like outer, oral papillae The specimens range in size from less than 3 mm. disk diameter to a full 8 mm. No differ- ences were detected between the specimens from 60 fathoms and those from 1,973. It is interesting to note that in spite of this great bathy- metrical range, the temperature range is less than 8° and the bottom at all the stations was soft, without rocks or shells. AMPmURA LEPTODOMA, new ; Disk a little more than 3 mm. in diameter; arms about 25 mm. long. Disk covered by numerous (300 to 400) small scales. Radial shields large, about twice as long as wide, separated, except at distal ends. First upper arm plate twice as wide as long, elhptical; suc- ceeding plates broadly oval, widin* than long, scarcely in contact. « AeiLTodonog, signifying slightly built, in reference to the general Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - col
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