308 A. Alcock — Supplementary List of Indian Fishes. [No. 3, 



caudal. Pectorals broad and falciform, several times larger than the 

 ventrals. 



Colours in spirit hyaline, occiput and caudal peduncle black. 



A single specimen about 5 inches long, and apparently mature, 

 from off the Indus Delta, 947 fms. 



It is so fragile that I am afraid to dissect it. 



§ 2. Notes on some of the previously described new forms. 

 Family Spinacidse. 



Centroscyllium ornatum, Alcock. 



Paracentroscyllium ornatum, Alcock, Ann. Mag. Nat. Hist. (6) IV. 

 1889, p. 379 : 111. Zool. ' Investigator,' Fishes, pi. viii. fig. 2. 



This species, the supposed type of a new genus, was described from 

 three very young and not very well preserved specimens from the 

 Bay of Bengal. 



Four much larger specimens — the largest nearly a foot long — have 

 lately been dredged in the Arabian Sea, and these while quite clearly 

 identical with the Bay of Bengal species, also quite clearly belong to 

 Miiller and Henle's genus Centroscyllium; of which Paracentroscyllium 

 now becomes a synonym. The fallowing is the amended diagnosis of 

 the species : — 



All the tissues extremely fragile. Head very large, very flat and 

 depressed, branchial regions laterally expanded. Snout much depressed, 

 polygonal : nostrils very large, situated on ventral surface of edge of 

 snout. Under surface of snout with numerous rather large pores, two 

 rows of which form an elegant T- or V-shaped figure that extends 

 between the nostrils. Eyes very large, their major diameter nearly as 

 long as the snout and nearly a fifth the length of the head (branchial 

 region included). Spiracles rather small, situated on the upper surface 

 of the head, behind the eye. Mouth crescentic, large : minute tricuspid 

 teeth in both jaws. Body covered with minute deciduous placoid scales, 

 the spine of each scale with a stelliform base. 



Dorsal spines very strong and acute, the 2nd nearly twice the 

 size of the 1st. The 1st dorsal fin arises in advance of a point midway 

 between the pectorals and ventrals, the 2nd arises immediately behind 

 the level of the base of the ventrals. 



Colours uniform jet-black, but the integument is very deciduous. 



Family Ophidiidae. 



Neobythites, Goode and Bean. 

 In the definition of this genus the ventral fins should, I think, be 

 stated to consist of either one or two rays, so as to include Monomitopus, 



