THE FISHES OP MALABAR. 277 



Teeth — Pointed, with tetragonal bases; they slightly project beyond the margin of the jaws. 



Fins — Ventrals tetragonal, with the angles acute in the young, rounded in the adidt. Caudal 

 rounded. 



Colours — Dull reddish-olive above, whitish beneath: a largo whitish spot at the posterior 

 margin of tho disk, another above the terminatinn of the ventrals, and a third on either sido of 

 the root of the caudal. Anterior half of ventrals whitish. Dorsal and caudal darkish above, 

 light beneath. Iris golden. 



Rather rare in Malabar, grows to nine inches or more in length. 



Habitat — Seas of India and Malaysia. 



Group TRIGONES. 



Genus TEYGON, (Adanson,) Mull. & Henle. 



Teigonobatus, Blainv. 

 Dasybatus, Rafin. 

 Pastinace, Dumeril. 



Disk oval or rhoinboidal. Tail of equal length to, or longer than the body, without a hern (Himantwa) > 

 or with one not extending to its apex. Mouth slightly arched. Teeth with a central point or transverse 

 tubercle, which in some is rough, and with a more or less distinct transverse furrow in front and behind, 

 that of the lateral teeth being most distinct : the whole surface is more or less wrinkled : membraneous 

 valve of the upper jaw with a straight deeply fringed margin, a second behind it which is deeply notched. 

 In the lower jaw several papilla? behind the teeth. 



Tail without fin. 



Trygon uarnak. 



Rajah uarnak, Forsh. p. 18, no. 16, b. 

 Trygon Eussellii, Gray, HI. I. Z. ii. pi. 100. 

 Trygon variegatus, Mc Clelland, Cal. J. N. H. i. p. 60, pi. 2, f. 2. 

 Trygon uarnak, Cantor, Catal. p. 423 ; Bhjtli, Cartilaginous Fishes of lower Bengal, 

 Journal Asiatic Society, xxx. p. 44, no. 23 ; Dumeril, Ich. gen. i. p. 585. 



Disk slightly broader than long, snout triangular, pointed, and very prominent in the young, 

 but in the adult its length from between the centre of the nostrils exceeds by one-third the 

 breadth of that interval. 



Mouth slightly arched : membraneous valve of the upper jaw having a straight deeply fringed 

 margin, the posterior valve deeply notched. In the immature the eyes are prominent, not so in 

 the adult, in which last they do not project beyond the level of the spiracles. 



Teeth — With a central point or transverse tubercle, having a shallow groove before and 

 behind : there are several papillae in the mandibulae behind the teeth. 



Fins — Caudal about four times as long as the body, compressed laterally, and widest in front 

 of its serrated spine, which is situated about the end of the first eighth of the tail : beyond this 



