FAMILY RAIID.E. — RHINOPTERA. 375 



THE BROAD STING-RAY. 



Pastinaca maclcra. 

 plate i.xv. fig. 2c 

 Raia maclura. Lesceoe, Jour. Acad. Nat. Ki:. Vol. !, p. 41, plate. (Ki'inali-.) 



Characteristics. Body oval, elliptical, broader than long. Tail short ; one third of the length 

 of the body. Width si.\ to ten feet. 



Descrqition. Shape transversely elliptical. Snout blunt, not produced beyond the lateral 

 margins of the pectoral fins, but continuous with them. Surface roughened with minute 

 granulations like shagreen. Eyes small, and near the snout; temporal orifices large, and near 

 the eyes. Nostrils small, and near the mouth, not extending to the upper lip. Mouth seven 

 or eight inches, with minute numerous triangular acute teeth, each emarginate at the base, 

 for the reception of the hind teeth. Ventral fins short, broad and rounded. Tad short, tri- 

 angular, one-third of the length of the body, with one or two spines very near the base. 



Color. Above greenish blue, with small black vermicular interrupted linos, and larger dis- 

 tant pale spots ; beneath pale red. Pupils black, round ; irides green, radiated with black. 



Length, 42-0. Width, 79-0. 



According to Lesueur, whose description and figure I have adopted, this species is found 

 at Newport (R. 1.), and is frequently found measuring from fifteen to eighteen feet in width. 



[EXTRA-LIMITAL) 



P. sahtaa. (Lesueur, Ac. S. Vol. 4, p. 109.) Orbicular. Tail more than twice as long as the body. 

 Ventral fins long, pointrd. A row of spines upon the back and the origin of the tail. Two spines 

 on oacli side of the back. Upper part of the head rough. Length . Horida. 



GENUS RHINOPTERA. Kuhl. 



Head distinctly projecting from the pectorals, and divided into two sliort lobes ; beneath 

 which are two similar ones. Teeth broad andjlal. 



THE COW-NOSE RAY. 



RlUNOPTKHA QDADRILOBA. 



ri.ATK I.XVI. FIG. 217. 



Raia bonasus, Tfie Cow-nose Ray. MiTCTiiLL, Tran.i. Lit. and Phil. Soc, Vol. 1, p. 470 

 Raia iiuadriloha. Lesuccr, Jour. Acad. Nat. Sciences, Vol. I, p. 44 ([)lato). 



Characteristics. Body rhoiuboidal, elevated along the dorsal line. Pectorals acute. Tail 

 slender, longer than the body. Width of the body two feet. 



