224 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1885. 



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cies, under the mime Trygon, that had been named and figured on plates 

 published in 1817. In this publication there is nothing on which to 

 base a claim for priority in favor of the name Trygon. 



Unless there was a publication of the name Trygon between 1758 and 

 1810, not yet come to our notice, a due regard for the rule of priority 

 compels its reduction to the rank of a synonym for Dasyhatus. 



At present the genus contains the species given below, nearly or quite 

 all of which are valid. 



DASYBATUS. 



Eaja tuierculata LaC, 1800, Hist. Poiss., ii, 106, pi. 4, f. 1. 



Trygon reticulatus Gtbr., 1880, Auu. Mag. N. H., vi., 8. 



T. longa Gariu., 1880, Bull. Mus. Conip. ZooL, 170. 



Baia centrura Mitcli., 1815, Traus. Lit. & Phil. Soc, 1, 479 



Trygon hastaia DeK., 1842, N. Y. Fauna, Fishes, S75. 



T. brevis Garm., 1880, Bull. M. C. Z., 171. 



Jiaja sayi Les., 1817, Jour, Phil. Ac, i, 4'2. 



Dasybatis dipterurus Jord., 18S0, Pr. U. S. Mus., 31. 



Trygon sabina, Les., 18'24, Jour. Phil. Ac, iv, 109. 



Ilaja uarnak Forsk., 1775, Descr. Auim., 18. 



Trygon marginatus Blyth, 1860, Jour. As. Soc. Bengal, 38. 



T. gerrardi Gray, 1851, Chondropt., 116. 



T. punctata Gthr., 1870, Cat., viii, 474. 



T. bleekeri Blyth, 1860, Jour. As. Soc. Bengal, 41. 



T. walga M. & H., 1841,Plagiost., 15), pi. 50. 



T. polylepis Blkr., 1852, Verh. Bat. Gen., xxiv. Flag., 73. 



T. nuda, Gthr., 1870, Cat., viii, 476. 



liaja gesneri Cuv., 1820, R. Anini., 400. 



Trygon brucco Bonap., 1832-41, Fauna Ital., Pesoi. 



T. violacea Bonap., I.e. 



Raja pastinaca Linn., 1758, Systema, 232. 



Trygon kuhlii M. & H., 1841, Plagiost., 1864, pi. .50. 



T. margarita, Gthr., 1870, Cat., viii, 479. 



T. rudis Gthr., 1870, I. c, 479. 



Hemilrygon ulpam Smith., 1859, Pr. R. Phys. Soc. Edinb., 64. 



Trygon benncitii M. & H., 1841, Plagiost, 160, pi. 52. 



Baja tmbricaia Bl., Schn., 1801, Syst. Ichth., 366. 



Trygon zugei M. &. H., 1841, Plagiost., 165, pi. 53. 



T. brevicaudala Button, 1875, Anu. Mag. N. H. (4), xvi, 317. 



T. Uocephalus Klnzgr., 1871. Syuops. Red Sea Fishes, 238. 



T. lata Garm., 1880, Bull. M. C. Z., 170. 



T. {Himantura) oxyrhynchus Sauvage, 1878, Bull. Soc. Philom., 94. 



Dasybatus varidens Garm., 1885, Pr. U. S. Mus., 40. 



Baja sephen Forsk., 1775, Descr. Anim., 17. 



