474 PROCEEDINGS OF THE ACADEMY OF [May, 



identified from there since Le Sueur's time. In 1S38 Miiller and 

 Henle report one from New York ; and in 1882 Garman notes it from 

 the same locality with others from Florida and Brazil. The differences 

 pointed out by the latter, in separating this species from Trygon 

 hastata De Kay, do not seem to me to be altogether conclusive that 

 the latter is really a species distinct from the present. My examples 

 seem to cover the alleged points of difference to a great extent. Small 

 examples seem to be entirely smooth, and others have three short rows 

 of spines on middle of disk, when large. In the summer of 1907 

 I first thought these rays were most likely the present species, but 

 the variation seemed to confuse them with T. hastata. The character 

 of a broad fold above and below on the tail may be reliable, but my 

 examples also show three series of tubercles on shoulders, at least the 

 large ones. Others with broad tail folds also show the median ver- 

 tebral row of thorns distinct and becoming enlarged posteriorly, 

 besides a roughened tail. In fact. I have noted examples which agree 

 with Le Sueur's figure of Raja say and De Kay's and Storer's of 

 Trygon hastata, and that these are individual variations due to age 

 and sex I have no doubt. 



Dasyatis sabina (Le Sueur). 



Two from Bayport, Fla., and another without data. 



Dasyatis pastinaca (Linnams). 

 Ten from Italy and one from Beirut, Syria. 



Dasyatis ujo Rafinesque. 



{Trygon brucco Bonaparte, Icon, Faun. Ital., Peso. Ill, pt. 2, VI, 1S3-J. 

 descr., PI. Italy.) 



Cotypes of T. brucco, two examples. 



PTEROPLATYTRYGON subgen. nov. 

 Type Trygon violaceum Bonaparte. 



Disk width much greater than length, front margin broadly convex. 

 No upper tail fold after caudal spines. 



From Hemitrygon Miiller and Henle this differs in the broad disk, 

 obtuse in front, and suggesting Pteroplatea. The small snout tip is 

 within a slight emargination of the front edge of the disk. 



(Ihepov, fin; -karu?, broad; rf>uyu)^ y Trygon.) 



Dasyatis violaceus (Bonaparte). 



{Trygon violaceum Bon., Icon. Faun. Ital., Pesc. Ill, pt. 2, I, 1832, descr., 

 PI. Italy.) 



Cotypes of T. violaceum Bon., two examples. 



