NORTH PACIFIC OPHIURANS IN NATIONAL MUSEUM CLAKK. 215 



disk spines and tlie lar^e adoral plates recall some of the deep-sea 

 types collect(Ml ])y the Challenger. 



OPHIACANTHA GRANULOSA. 



Ophiacantha granulosa Lyman, Bull. Mus. Comp. Zool., vol. 5, 1878, p. 138. 



Localities. — Albatross station 3755, off Suno Saki, Honshu Island, 

 Japan, 52 to 77 fathoms, gray sand, coral, 4 specimens ; station 4895, 

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

 green sand, broken shells, pebbles, 1 specimen; station 4936, Eastern 

 Sea, lat. 30° 54' 40" N. ; long. 130° 37' 30" E., 103 fathoms, stones, 

 bottom temperature 60.6°, 5 specimens. 



None of the specimens are as large as Lyman's type, but they do 

 not differ in any structural feature so far as I can see. They range in 

 disk diameter from 3 to 6 mm. The numerous, long, slender, smooth 

 spines, the granular disk covering, and the bare radial shields are a 

 very distinctive combination of characters. 



OPHIACANTHA NORMANI. 

 Ophiacantha normani Lyman, Bull. Mu.s. Comp. Zool., vol. 0, 1879, p. 58. 



Localities. — Albatross station 2853, off Alaska, lat. 56° N. ; long. 154° 

 20' W., 159 fathoms, gray sand, bottom temperature 41°, 81 speci- 

 mens; station 2858, off Alaska, lat. 58° 17' N.; long. 148° 36' W., 230 

 fathoms, blue mud, gravel, bottom temperature 39.8°, 37 specimens; 

 station 2860, off Washington, lat. 51° 23' N.; long. 130° 34' W., 876 

 fathoms, green mud, bottom temperature 36.5°, 14 specimens; sta- 

 tion 2871, off Washington, lat. 46° 55' N.; long. 125° 11' W., 559 

 fathoms, brown ooze, bottom temperature 38.4°, 811 specimens; sta- 

 tion 2873, off Washington, lat. 48° 30' N. ; long. 124° 57' W., 40 

 fathoms, rocks, bottom temperature 47.8°, 1 specimen; station 3069, 

 off Washington, lat. 47° 25' 30" N.; long. 125° 42' W., 760 fathoms, 

 green mud, bottom temperature 37.6°, 10 specimens; station 3070, 

 off Washington, lat. 47° 29' 30" N.; long. 125° 43' W., 636 fathoms, 

 green mud, bottom temperature 37.9°, 302 specimens; station 3071, 

 off Washington, lat. 47° 29' N. ; long. 125° 33' 30" W., 685 fathoms, 

 green mud, bottom temperature 38°, 102 specimens; station 3073, 

 oiT Washington, lat. 47° 28' N.; long. 125° 15' W., 477 fathoms, green 

 mud, bottom temperature 49.2°, 20 specimens; station 3074, off 

 Washington, lat. 47° 22' N.; long. 125° 48' 30" W., 877 fathoms, 

 green mud, bottom temperature 36.6°, 33 specimens; station 3075, 

 off Washington, lat. 47° 22' N.; long. 125° 41' W., 859 fathoms, green 

 mud, bottom temperature 36.6°, 122 specimens; station 3316, Bering 

 Sea, lat. 54° 1' N.; long. 166° 48' 45" W., 309 fathoms, black sand, 

 gravel, bottom temperature 38.2°, 150 specimens; station 331 7, Bering 

 Sea, lat. 53° 57' 40" N.;l()ng. 166° 57' W., 165 fathoms, coarse sand, 



