434 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Head to hind spiracle edge 9% in total length. Snout li^ in head 

 to hind spiracle edge, as seen above front profile obtusely rounded 

 sometimes with short terminal projection ; eye small, about 12 in head, 

 8 in snout, 5% in interorbital ; mouth rather small, lower jaw more 

 distinctly undulated than upper, which nearly straight ; teeth faintly 

 tinged brown, unworn ones distinctly but minutely ridged longitudi- 

 nally, strong transverse ridge with well-marked concavity on surface 

 in front; two short papillae on mouth floor, one near each angle; 

 interorbital 1% in head to hind spiracle edge. Spiracle nearly twice 

 large as eye, close behind eye, interspiracle width 1^ in head. 



Skin delicate. Head and center of back covered with close-set, 

 rounded, nearly flat denticles, on tail intermixed with stellate spines. 

 On back denticles gradually smaller from middle outward and not 

 forming clearly defined design; externally each side some with stel- 

 late bases, this marked on those on pectorals where somewhat ar- 

 ranged in longitudinal lines; extend to margin and sometimes over 

 it on ventral surface. 



Tail without folds and with single large caudal spine; pectorals 

 form broad quadrangular disk, length ly^ its width or 2% in tail, 

 outer angles somewhat narrowly rounded, front edges nearly linear 

 and hind edges only slightly convex; ventrals small. 



Above gray, with distinct blackish tint and without any tinge of 

 brown. Male with series of livid bluish marks running round disk at 

 some little distance from margin. Tail blackish. Ventral surface 

 white, with broad blackish margin laterally and posteriorly, some- 

 times indistinct. Length, 342 mm. (Annandale.) 



India, Burma. 



DASYATIS IMBRICATUS (Schneider) 



Raja imbricata Schneider, Syst. Ichth. Bloch, p. 366, 1801 (type locality: Coro- 

 mandel). 



Trygonohatus imhricatus Blainviixe, Bull. Soc. Philom. Paris, vol. 8, p. 112, 

 1816 (name only). 



Trygon imbricata Cttvier, R&gne Animal, vol. 2, p. 136, 1817 (reference). — 

 MiJTXEB and Henle, Syst. Beschreib. Plagiostomen, p. 164, 1841 (Coroman- 

 del; Java). — Cantok, Journ. Asiatic Soc. Bengal, vol. 18, p. 1407, 1849 

 (Pinang Sea, Singapore, Malay Peninsula). — Bleekeb, Verb. Batav. Ge- 

 nootsch. (Madura), vol. 22, p. 6, 1849 (Bangcallang and Kammal). — Gbat, 

 List fish British Museum, p. 119, 1851 (reference). — Bleekeb, Verb. 

 Batav. Genootsch. (Plagiost.), vol. 24, p. 63, 1852 (Coromandel, Bengal) ; 

 (Bengal), vol. 25, p. 9, 1853 [on Isacurrah tevkee Russell, Fishes of Coro- 

 mandel, vol. 1, p. 3, pi. 4 (Vizagapatam), p. 24 (on McClelland), p. 82, 1803 

 (reference)]. — Blyth, Journ. Asiatic Soc. Bengal, vol. 29, p. 40, 1860 (Cal- 

 cutta). — GtJNTHEE, Cat. Fishes British Mus., vol. 8, p. 481, 1870 (com- 

 piled). — Day, Fishes of India, pt. 4, p. 739, 1878; Fauna Brit. India, Fishes, 

 vol. 1, p. 52, 1889. — Annandale, Mem. Indian Mus., vol. 2, p. 32, pi. 3, fig. 

 5, text fig. 6, 1909 (Puri on Orissa coasts). — Pearson, Ceylon Administr. 

 Rep., 1912-13, p. E13.— Maijas, Ceylon Administr. Rep., 1921, p. E5. 



