238 s. goto: 



difficult to classify satisfactorily. Two resemble ardicus but liave a larger 

 disk, shoi-ter and broader rays, and larger snperomarginals. The third much 

 resembles anomahis, and in the sum of its characters stands about midway 

 between the two specimens, above referred to, and cmomalus, wliich was 

 taken at the same station. The abeiTant specimens liave inferomarginals 

 resembling those of arcticus. 11 = 37 mm. (largest specimen); r = 15mm. ; 

 R=:2.5 r. Breadth of ray at base, measured from interradial line, 18 mm. 

 It is not improbable that this species hybridizes with anomalits whenever 

 the ranges overlap, and that the very abeiTant specimens may be explained 

 by such a theory. 



" Tupe-loccdU}]. — Öxfjord, Finmark, 100 to 150 fathoms. 



" Disfrilndion. — The distrilnition of this species is evidently circumpolar. 

 In the Atlantic hemisphere it is found along the east coast of North 

 America from lat. 38° to 45° N., and on the coast of Europe from south of 

 Ii-eland, the Faroe Channel, off Norway from Trondhjem to Finmark, and 

 eastward to Barents Sea and the Miuman coast.^' In the north Pacific 

 region the species ranges over Bering Sea and south on the Asiatic side to 

 Yezo, Japan. 



" Specimens examined. — One typical from station 4792, vicinity of Com- 

 mander Islands, 72 fathoms, pebbles; two aberrant forms, 3602, vicinity 

 Pribilof Islands, Bering Sea, 81 fathoms, gi-een mud, sand ; one from 5047, 

 off Hokushu, Japan, 107 fathoms, dark gi'ay sand, broken shells, pebbles. 



" Remarhs. — The specimen from near the Commander Islands agrees in 

 most particulars with an example from the coast of Maine (station 21, Cashes 

 Ledge). The Atlantic specimen has the raised ridges of inferomarginals at 

 base of ray, slightly wider. 



MoRTENSEN reports this starfish from Greenland as follows [ : 13, p. 328] : 



" Forekomst (Occurrence). Vest GrOnknd : 66° 49' N. 56° 28' V., 235 

 Fv. (Wandel, 1889, 1891). 66^ 21' N. 56° 54' V., 400-600 m ; 66" 42' N. 

 56° 12' v., 130 Fv. ; 66"" 44' N. 56° 08' V. ; ca. 175 Fv. ; 66^" 45' N 56° 

 30' v., ca. 200 Fv. (' Tjalfe ' 1908-09). Bredefjord, 225-290 m. (Ste- 



PHENSEN, 1912). 



1) " Condensed from Ludwig " [ : 00, p. 452]. , 



