cccv 



exfenfJj^ hn/nvdthemifflfl of llie mnnlh. Teeth w'llli a sharp Iriangwlar cusp, 

 sometimes dilated. 'J he Jirsl dorsal fm, destitute of a spine, is placml 

 opposite the interspace betioeen the jicctoral and ventral: caudal icilk a 

 distinct lower Me. 



397. Carcharias Ganrjelivus, Miill. and IIoulc. Teetli-?!:?". Of a 

 groy colour. Tliis s.-ivno-c sromid-slimlc ascends all tlic larg'o rivers of 

 Jiidia aud to above iidal iiilliu-ncc ; it attains 5 feet in length. 



Sub-Order— B AVOID EI, OR RAYS. 



Body depressed, forming, due to largely developed pectoral 

 iins, a more or less flat disc, aud liaviug a thin and 

 slender tail. Spiracles present. Gill-opcniugs iu five 

 pairs, inferior. Dorsal llu, when present, on the tail : 

 anal absent. 



Family —V nisr IT) M. 



Snout niuch protUiccd, flattened, and having a saw-like appearance, due to large teetb 

 existing along its lateral edges. 



Genus — Peistis, Latham.. 



Body elongate and depressed. Gill-ojirniugs inferior and of moderate 

 width. Spiracles wide and posterior to the eye, which latter has no nic- 

 titating 7i>embrane. Nos!rits inefrior, without tentacles. Teeth minute. 

 J)orsal fins spineless : the first quite or nearly opposite to (he ventrals : front 

 edge of pectoral free. 



398. Pristis cnspidatns, L.atliam. MaUauuddi and Irrawaddi 

 Rivers, asccudiug far above tidal iuilueuce. 



Family — TRYGONlDiE. 



Body flattened and disc-shaped, with a long and slender tail. Pectoral fins are conli- 

 nuod forwards anteriorly and laterally to the end of the snout. No lateial longi- 

 tudinal folds to the tail. Vertical fins, if present, in the form of a serrated spine. 



Genus — Trygon, Adanson. 



Nasal valves coalesce and form a triangular fiap. Teeth fattened. 

 Pectorals continued forwards to the lateral edge of the snout. Tail long, 

 tuhip-like, either destitute of any fin, or with cutaneous folds, which do 

 vot extend its entire length: armed superiorly with one or tivo serrated, 

 lanceolate spines. Body smooth or tuherculated. 



399. Trygon iiarnak, Forsk. Sankush, Ooriah. Ascends rivers, 

 often aliove tidal inlluence. 



400. Trygon sephen, Forsk. This species is also frequently captured 

 above tlie influence of' the tides. 



