396 THE PLAGIOSTOMIA. 



Specimen described obtained by Dr. Thomas Barbour in southern Celebes. 

 Snout to abdominal pores 6, pores to end of tail 12, and greatest width 82 inches. 



Japan to India; East Indies. 



D. varidens differs from this species in a broader disk and lack of spots. It 

 may be that this form represents a variety of D. kuhlii distinguished by lack of 

 dorsal spots and caudal rings. 



Dasybatus say. 



Raia say Lesueur, 1817, Journ. Acad. nat. sci. Phil., 1, p. 42, pi. 



Trygon sayi Mulleu & Henle, 1841, Plagios., p. 166; Dumeril, 1865, Elasm., p. 603. 



Mijliobalis sayi DeKay, 1842, N. Y. fish., p. 376; Storer, 1846, Mem. Amer. acad., new ser., 2, p. 262. 



Dasyatis sayi Jordan & Gilbert, 1882, Bull. 16, U. S. nat. mus., p. 48; Jord. & Everm., 1896, Bull. 



47, U. S. nat. mus., p. 86; Ribeiro, 1907, Arch. Mus. nac, 14, p. 189, pi. 19. 

 Dasibatis sayi Garman, 1882, Bull. 16, U. S. nat. mus., p. 69. 



Disk subquadrangular, little wider than long; anterior margins nearly 

 straight, meeting at the end of the snout in a blunt angle; hinder and inner 

 margins convex. Mouth with five papillae at the bottom; upper jaw undulated, 

 lower prominent in the middle; teeth small; sharp in adult males, smooth in 

 females. Ventrals rounded. Tail rather more than one and one half times the 

 length of the disk, with a short fold behind the caudal spine above and a longer 

 Httle deeper one below ending about opposite the end of the upper. Body and 

 tail smooth; a single rounded tubercle on the middle of the back. AUied to 

 D. pastinacus but more blunt at the end of the snout, more rounded on the 

 pectoral angles and longer in the tail. 



Olive-brown, lighter to yellowish on young; white below. 



New York to southern Brazil. 



Dasybatus brevis. 

 Plate 32, fig. 5-6. 



Trygon brevis Garman, 1880, Bull. M. C Z., 6, p. 171. 



Dasijbalis diplerurus Jordan & Gilbert, 1881, Proc. U. S. nat. mus., 4, p. 31; Garman, 1882, Bull. 16, 



U. S. nat. mus., p. 71. 

 Dasyatis dipterura Jordan & Gilbert, 1882, Bull. 16, U. S. nat. mus., p. 48; Jord. & Everm., 1896, 



Bull. 47, U. S. nat. mus., p. 85. 

 Dasibatis brevis Garman, 1882, Bull. 16, U. S. nat. mus., p. 70. 

 Dasyatis hawaiensis Jenkins, 1904, Bull. U. S. fish, comm., 22, p. 421, pi. 1, f. 1; Jord. & Everm., 1905, 



Bull. U. S. fish, comm., 23. p. 48, pi. 4, f. 1. 

 Trygon Jiawaiensis Gunther, 1910, Siidsee fische, p. 494. 



Disk subquadrangular, rounded, little wider than long, anterior margins 

 meeting in a blunt angle at the end of the snout, outer and hinder extremities 



