NORTH PACIFIC OPHIURANS IN NATIONAL MUSEUM CLARK. 215 



disk spines and the large adoral plates recall some of the deep-sea 

 types collected by 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. Mus. Comp. Zool., vol. 6, 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, 

 off 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 3317, Bering 

 Sea, lat. 53 57' 40" N.;long. 166 57' W., 165 fathoms, coarse sand, 



