8 THE VOYAGE OF H.M.S. CHALLENGER. 



Habitat. — South of Japan, Station 235 ; depth, 3G5 fathoms. One specimen, 

 female. 



Raja circularis, Couch. 



Of the Sandy Kay, only one specimen, a female, 1 5 inches long, was obtained on the 

 cruise of the "Triton" in the Faroe Channel, at a depth of 516 fathoms (Station 10, 

 August 24, 1882). Also CoUett^ reports its occurrence in 130 and 870 fathoms off the 

 coast of Norway. 



The Faroe specimen does not differ in its armature from specimens obtained on the 

 south coast of England, only the spines on the upper side of the snout and the inter- 

 orbital spa ;e are somewhat more developed, though in this respect littoral specimens 

 show likewise some variation. 



With regard to colour, it is notable that the spot on each side of the back which, in 

 littoral specimens, is variegated with yellow, is much smaller in the deep-sea specimen, 

 and uniformly black, without yellow. The lower parts are nearly uniform blackish-brown, 

 which colour laps over to the upper side of the ventral fins. Tail with irregular brownish 

 cross-bands. 



Raja radiata, Donovan. 



This species, which is widely distributed on the coasts of Northern Europe and North 

 America, has been met with in the sea between Bear Island and Spitzbergen at depths 

 of from 127 to 259 fathoms ;' and in Throndhjem Fjord in 250 fathoms.^ 



Raja hyperhorea (PL TV".). 



Baja hyperhorea, Collett, Forhandl. Videusk. Selsk. Christ., 1878, p. 7 ; Norsk. Nordh. Exped. 

 Zool. Fisk., p. 9, pi. i. 



The margins of the snout form a right or a nearly right angle, its extremity being 

 rounded ; the margin of the body between the snout and the extremity of the pectoral 

 fin is undulated. Width of the interorbital space considerably exceeding that of the 

 orbit and spiracle ; eye rather small, about as long as the spiracle. Distance between 

 the nostrils a little more than their distance from the end of tlie snout. Teeth very 

 slender, acutely pointed, widely set with narrow base. Outer pectoral angle nearly a 

 right one. 



Sides of the trunk nearly smooth, but the greater part of the pectorals and the margin 



1 Forhandl. Vidensk. Selsk, 1880, p. 105, and Nyt Mag. f. Naturvid., xviii., 1884, p. 119. 

 = Collett, Nor.sk. Nordh. Exped. Fisk., p. 14. 



2 Strom, Norsk. Vid. Selsk. Skrift., 1881, p. 79 ; Collett, Nyt Mag. /. Naturnd., xviii., 1884, p. 118. 



