268 BULLETIN 75, UNITED STATES NATIONAL MUSEUM, 



due to a ridge, a furrow, or color; possibly the plate is thinner along 

 that line. Side arm plates not very large, each with about eight 

 blunt, nearly smooth arm spines, of which the lowest are very small, 

 while the two or tliree uppermost are equal to two or tlu-ee joints. 

 Tentacle pores large but tentacle scales wanting. Color (dried from 

 alcohol), disk pure white, arms and spines very pale cream or fawn 

 color, interbranchial spaces below dark brown or blackish; a few 

 specimens have a reddish tinge, and in one very small specimen the 

 bare part of the radial shields is deep pink. 



Localities. — Albatross station 3707, off Ose Zaki, Honshu Island, 

 Japan, 63 to 75 fathoms, volcanic sand, ashes, gravel, 5 specimens; 

 station 3715, off Ose Zaki, Honshu Island, Japan, 65 to 68 fathoms, 

 volcanic sand, shells, rocks, 15 specimens; station 3727, off Omai 

 Zaki, Honshu Island, Japan, 34 fathoms, mud, coarse sand, black 

 shells, 13 specimens; station 3729, off Omai Zaki, Honshu Island, 

 Japan, 34 fathoms, mud, gravel, 8 specimens; station 3734, off Omai 

 Zaki, Honshu Island, Japan, 36 to 48 fathoms, coarse gray volcanic 

 sand, broken shells, 10 specimens; station 3735, off Omai Zaki, Hon- 

 shu Island, Japan, 36 fathoms, coarse gray volcanic sand, broken 

 shells, 1 specimen; station 4875, Korea Strait, lat. 34° 19' N.; long. 

 130° 9' E., 59 fathoms, fine gray sand, broken shells, bottom tempera- 

 ture 62.1°, 1 specimen; station 4890, Eastern Sea, lat. 32° 26' 30" 

 N.; long. 128° 36' 30" E., 135 fathoms, rocky, bottom temperature 

 52.3°, 1 specimen; station 4893, Eastern Sea, lat. 32° 32' N.; long. 

 128° 32' 50" E., 95 to 106 fathoms, gray sand, broken shells, pebbles, 

 bottom temperature 55.9°, 2 specimens; station 4894, Eastern Sea, 

 lat. 32° 33' N.; long. 128° 32' 10" E., 95 fathoms, green sand, broken 

 shells, pebbles, bottom temperature 55.9°, 3 specimens; station 4895, 

 Eastern Sea, lat. 32° 33' 10" N.; long. 128° 32' 10" E., 95 fathoms, 

 green sand, broken shells, pebbles, bottom temperature 55.9°, 5 speci- 

 mens; station 4936, Eastern Sea, lat 30° 54' 40" N.; long. 130° 37' 

 30" E., 103 fathoms, stones, bottom temperature 60.6°, 10 specimens; 

 station 4948, Bungo Channel, lat. 31° 19' N.; long. 131° 23' E., 65 

 fathoms, dark gray volcanic sand, broken shells, pebbles, bottom 

 temperature 62.6°, 5 specimens; station 5069, Suruga Gulf, lat. 35° 

 3' 10" N.; long. 138° 47' E., 108 to 131 fathoms, mud, sand, broken 

 shells, bottom temperature 55.8°, 1 specimen; station 5070, Suruga 

 Gulf, lat. 35° 3' 25" N.; long. 138° 47' 40" E., 108 fathoms, mud, 

 sand, broken shells, bottom temperature 57.6°, 2 specimens. Bathy- 

 metrical range, 34 to 135 fathoms. Temperature range, 62.6° to 52.3°. 

 Eighty-two specimens. 



Type.— Csit. No. 25712, U.S.N.M., from station 4875. 



This unusually handsome and well-characterized species reminds 

 one strongly of Ophiogymna, but the disk spines and upper arm plates 

 are those of an OpMotlirix and it seems better to place it in that genus. 



