NORTH PACIFIC OPHIURANS IN NATIONAL MUSEUM CLARK. 33 



and lighter; arms with three or four narrow, irregular, cream-colored 

 cross-bands; lower surface of disk and arms, yellowish-white. 



Locality. Albatross station 4893, off Goto Islands, Japan, lat. 

 32 32' N. ; long. 128 32' 50" E., 95 to 106 fathoms, gray sand, broken 

 shells, pebbles, bottom temperature 55.9, 3 specimens. 



Type. Cat. No. 25532, U.S.N.M., from station 4893. 



Although this species is very near bispinosa Koehler, it appears to 

 be well distinguished from that species by the shape of the upper- 

 arm plates and the much shorter arm spines. Kcehler's figure also 

 indicates that the disk plates of bispinosa are more or less convex or 

 swollen, while in elevata they are perfectly flat, although the disk 

 itself is decidedly elevated, sloping from. the central area to the in- 

 terradial margins. 



OPHIOZONA LONGISPINA. 



Ophiozona longispina H. L. CLARK, Bull. Mus. Comp. Zool., vol. 51, 1908, p. 290. 



Localities. Albatross station 3706, off Port Heda, Japan, 337 

 fathoms, green volcanic mud, 50 specimens; station 3707, off Ose 

 Zaki, Japan, 63 to 75 fathoms, volcanic sand, ashes, gravel, 10 speci- 

 mens; station 3708, off Ose Zaki, Japan, 60 to 70 fathoms, green mud, 

 volcanic sand, ashes, 191 specimens; station 3713, off Ose Zaki, Japan, 

 45 to 48 fathoms, volcanic sand, shells, rocks, 4 specimens; station 

 3739, off Ose Zaki, Japan, 55 to 65 fathoms, volcanic sand, shells, 

 rocks, 6 specimens; station 3740, off Ose Zaki, Japan, 65 fathoms, 

 volcanic sand, shells, pebbles, 5 specimens; station 4965, oil' eastern 

 Japan, lat. 33 35' 20" N.; long. 135 10' 50" E., 191 fathoms, dark 

 green-gray sand, shells, bottom temperature, 49.4, 2 specimens; 

 station 5055, in Suruga Gulf, Japan, lat. 34 53' N. ; long. 138 44' 15" 

 E., 124 fathoms, green mud, gray sand, broken shells, pebbles, bot- 

 tom temperature 56. 6, 1 specimen; station 5095, in Uraga Strait, 

 lat. 35 5' 34" W. ; long. 139 38' 36" E., 58 fathoms, fine black sand, 

 broken shells, bottom temperature 57.8, 3 specimens. Bathymet- 

 rical range, 45 to 337 fathoms. Temperature range, 57.8 to 49.4. 

 Two hundred and seventy-two specimens. 



The largest of these specimens has the disk 14 mm. in diameter 

 and the arms over 40 mm. long. The disk is covered by about three 

 hundred plates, but two-thirds of these are mere scales intercalated 

 between the regular plates. The first fifteen upper arm plates are 

 in contact and several of the basal ones are pentagonal or tetragonal, 

 and wider than long. Interbrachial spaces below are covered by 

 forty to fifty plates. Under arm plates in contact out to about the 

 fifteenth joint. Oral papillae, oral shields, arm spines, tentacle scales 

 and color as in the original specimens. The specimen from station 

 5055 is peculiar in having much narrower arms than specimens o 

 its own size from station 3708. 

 34916 Bull. 7511 3 



