134 OPHIUKOfDE.l. 



STJtEPTOPUIUR^E {see p. 26). 



1. OPHIOSCOLEX. 



Ophioscolex, M. Tr. Syst. Ast. (1842) p. 109; Lyman, Chall. Rep. 

 Oph. (1882) p. 232. 



Teeth and mouth-papillse ; tooth-papillae present or absent. 

 No upper arm-plates. A thick naked skin covers all the disk and 

 extends on to the arms and spines. Tentacle-scales present or 

 absent. 



Key to the Species. 



Mouth-papillae seven to ten 1. O. glacialis. 



Mouth-papilla? ten or more 2. O. purpurea. 



1. Opliioscolex glacialis. 



Ophioscolex glacialis, M. Tr. Syst. Ast. (1842) p. 109; Burr, fy 

 M i Andrew, Ann. # May. xx. (1857) p. 46 ; Sars, Norg. JSch. (1861) 

 pp. 7 & 12 ; Lyman, Bull. M. C. Z. x. (1883) p. 268 ; Hoyle, Proc. 

 R. Soc. Edinb. xii. (1884) p. 720. 



Disk nearly circular ; arras seven to nine times as long as radius 

 of disk, flattened, tapering rather rapidly. All the parts of the disk 

 are obscured by the thick wrinkled skin, except the seven to ten 

 somewhat irregularly arranged delicate mouth-papillae. Three deli- 

 cate arm-spines about as long as the arm is broad. No tentacle- 

 scale. 



Colour, in spirit, yellowish white. 



11 = 65; 42. r = 7; 6. 



Distribution. Both sides of North Atlantic, as far south as 

 38° 21' 50" N., 73° 32' W. (West Indies?) on the west, from 

 Faeroe to Spitsbergen on the east. 100-300 fms. 



Some semi-macerated fragments, determined by Mr. Lyman, from 

 60° 0' N., 5° 13' W., 312 fms. ' Porcupine' Exp. 



2. Ophioscolex purpurea. 



Opliioscolex purpurea, Dub. 8f Kor. Vet.-Akad. Hdlq. 1844 (1846), 

 p. 235, pi. vi. tig. 2; Sars, Norg. Ech. (1861) p. 8. 



Opliioscolex purpureus, Lyman, Bull. C. M. Z. v. (1878) p. 233 id. 

 Chall. Rep. Oph. (1882) p. 234 ; Hovle, Proc. Roy. Soc. Ed. xii. 

 (1884) p. 720. 



Disk pentangular; arms about eight times as long as the radius 

 of the disk, flattened, do not taper very rapidly. Mouth-papilla- 

 more numerous (ten or more), stouter, and more regularly arranged 



