of the Bay of Bengal &e. 379 
It would be premature to indulge in any speculations con- 
cerning the bathybial fishes of the Bay of Bengal region ; but 
the occurrence in this region of forms so long considered 
characteristic of the deeper waters of Madeira and the Medi- 
terranean, many of which have also been found more lately to 
exist in Japanese waters and in the Pacific, must be con- 
sidered highly interesting. It is interesting also, from 
another point of view, to find species common to this region 
and to the American side of the South Atlantic. 
§2. List of the Fishes, with Descriptions of the new Species. 
PLAGIOSTOMATA. 
SELACHOIDEL 
Family Spinacide. 
PARACENTROSCYLLIUM, gen. nov. 
Allied to Centroscyllium. 
Two dorsal fins, each with a strong spine. No anal fin. 
Mouth crescentic, with a direct oblique groove at each angle. 
Teeth equal in both jaws, minute, simple, monocuspid, straight. 
Otn Pe ee gD Us S 
Nomembrananictitans. Gill-openings rather wide. Integu- 
ment smooth. 
Paracentroscyllium ornatum, sp. n. 
All the tissues fragile. Head broad and depressed, the 
branchial region conspicuously prominent. Body subcylin- 
drical. Tail long. Snout short, broad, depressed. Hyes 
large, their major diameter being one third of the head-length 
(branchial region included). Nostrils a little wider than the 
spiracles, borne at and on the under surface of the edge of 
the snout. Mouth crescentic and rather wide. Minute, 
simple, straight, monocuspid teeth in both jaws. Integument 
absolutely smooth. Dorsal spines very strong, the second 
much the larger. The first dorsal fin begins an interval 
behind the pectorals equal to the interval of the second behind 
the ventrals. Pectorals, ventrals, and caudal all large. 
Colours “deep violet black, lighter between the eyes; 
head with minute white spots arranged in the shape of a lute; 
ventrals with pale tips ” (Dr. G. M. Giles). 
Length 5} inches. 
‘Two males and one female, in bad preservation. 
Hab, Bay of Bengal, Swatch of No-ground, 405 to 285 
fathoms ; bottom Pteropod-ooze and green mud. 
