REPORT ON THE DEEP-SEA FISHES. 7 



Centvoscyllium gmmilatum. n. sp. 



The discovery of a specimen of this Arctic genus in the opposite hemisphere is highly 

 interesting ; unfortunately the specimen is in such a deteriorated condition, that we can 

 ascertain from it scarcely anything beyond its generic characters. Specifically, it must 

 be very closely allied to CentroscyUium fabricii, having the same disposition of the fins, 

 size of teeth and dorsal spines, but the epidermoid productions of the head and body 

 are much coarser, and in the form of granulations, whilst in CentroscyUium fabricii they 

 are minute. 



Habitat. — Port Stanley, Falkland Islands, Station 311; depth, 245 fathoms. One 

 specimen, 11 inches long. 



Lwmargus, M. and H. 

 Lsemargus borealis, Scoresby. 



Common in the North Atlantic, and frequently found on the surface ; but habitually 

 living at a considerable depth (150 to 300 fathoms), at least on the coast of Norway. ^ 



BATOIDEI— RAYS. 



Raja, Cuv. 

 Raja isotrachys, n. sp. (PL 111.). 



Snout rather produced, the anterior margins meeting at nearly a right angle. The 

 width of the interorbital space equals the length of the orbits. The distance between 

 the outer margins of the nostrils equals their distance from the end of the snout. Teeth 

 small, each with a point directed backwards towards the interior of the buccal cavity. 

 Outer pectoral angle rounded, but the margins of the fin would meet at a right angle. 

 Body and tail entirely covered on the upper surface with minute asperities, each with a 

 stellate base. No spines on the superciliary margin. A single small spine in the 

 middle of the back. A series of rather strong spines (eighteen) along the median line 

 of the tail, none on the sides. Upper parts uniform, brownish-grey ; lower parts smooth, 

 brownish-black. 



Distance between tlie snout and vent, . . . . . 10 inches. 



Length of the snout, ....... -^ i, 



Width of the body, ....... 13 „ 



Length of the tail, . . . . . . • 12^ „ 



1 Strom, Norsh Vid. Selsk. Skrift., 1884, p. 44; CoUett, A^ Mag.f. Naturiid., .wiii., 1884, jj. 117. 



