Jordan and Evermann. Fishes of North America. 85 



rounded outer extremities ; hinder and inner margins convex. Upper jaw 

 with a deep indentation, receiving a corresponding prominence on the 

 lower. Teeth at the sides of this indentation much larger ; mouth with 

 5 papilla?. Tail less than twice as long as the disk, tapering to a fine 

 point, rough with small prickles, similar to those scattered over the 

 head and back, a cutaneous expansion above, and a broader, longer one 

 In-low; these end nearly opposite each other, the lower extends for- 

 ward under the spine. A median row of tubercles on the dorsum and 1 

 or a pair on each shoulder. Distinguished from D. gymnura by the 

 shape of the snout, the rounded pectorals, the shorter tail, the larger 

 teeth, the greater curvature of jaws, the smaller size, and the 2 cuta- 

 neous expansions. Proportional length of body and tail as 4| to 8; in 

 no case is the tail twice as long as the disk. Color ochraceous brown. 

 Streams and estuaries of Florida, abundant on both coasts; several speci- 

 mens were taken in Lake Monroe, at a distance from salt water. (Gar- 

 man.) 



Trygon salhia, LE SuEtm, Jour. Ac. Nat. Sci. Phila., iv, 109, 1824, Florida. 

 tis salina, JORDAN & GILBERT, Synopsis, 68,1883. 



125. DASYATIS LONGA, Garman. 



Disk quadrangular, about wider than long. Margins nearly straight, 

 anterior meeting in a blunt angle on the end of the snout. Outer 

 angles rounded, posterior blunt. Ventrals rounded. Tail variable in 

 length, usually more than twice as long as the body, roughened with 

 small asperities, depressed anteriorly, compressed behind the spine, keeled 

 above the compressed portion, with a long, narrow, cutaneous expansion 

 on the lower side. Mouth curved, with 5 papillae ; a row of small tu- 

 bercles behind the head on the shoulder girdle. Larger' specimens prob- 

 ably with tubercles on back and tail. Gulf of California to Panama. 

 Perhaps not distinct from D. dipterura, from which it usually differs in the 

 slightly longer tail, and perhaps in the presence of 5 papillae instead of 

 3 in the mouth, (longus, long.) 



Dasibalis longa, GARMAN, Bull. Mus. Corap. Zoo!., vi, 170, 1880, Acapulco ; Panama ; JOR- 

 DAN & GILBERT, Synopsis, 66,1883. 



126. DASTATIS DIPTERURA, Jordan & Gilbert. 



Disk rhomboid, slightly broader than long, its anterior margins nearly 

 straight, meeting anteriorly in a very obtuse angle ; posterior margins 

 curved ; lateral angles rounded ; tail variable, usually i longer than the 

 disk, with a conspicuous cutaneous fold below and a smaller but evi- 

 dent one above; jaws considerably arched; buccal papillae 3; teeth f$. 

 Young perfectly smooth ; adult with a row of low but rather stout tuber- 

 cles on the median line of the scapular region and 2 others on the hu- 

 meral region; tail with small prickles; caudal spine long, its length 

 nearly 3 times the width of the mouth. Color bluish brown, nearly plain. 

 L. 6 feet or more. Bay of San Diego, and southward ; locally abundant. 

 (<5if, two; Trrepov, wing; ovpd, tail.) 



I><is!il<iti* (Upterunis, JORDAN & GILBERT, Proc. U. S. Nat. Mus., 1880, 31, San Diego. 

 Dasibati* dipterura, JORDAN & GILBERT, Synopsis, 71, 1883. 



