DH. GiJNTllER OX THE FISHES OF CENTRAL AMERICA. 487 



Coloration uniform. Pharyngeal teeth very numerous and small, increasing somewhat 

 in size downwards. 



Four examj^les, from 9 to 10 inches long, were obtained by Mr. Salvin in the Kio 

 Usumacinta. 



'271. Pristigaster macrors. 



(iuiitli. Proc. Zool. Soc. 1800, p. G0.3 ; and Fisli. vii. \). IGl. 



D" 1:5. A. 61. L. lat. 53. 



Abdominal profile but slightly convex, the greatest depth of the body being one-third 

 of the total length (without caudal); the length of the head is contained four times and 

 two-thirds in the same length ; eye very large, its diameter being more than one-third 

 of the length of tiie head, and nearly equal to that of the postorbital portion of the 

 head. There are thirteen scales in the transverse series ascending from the origin of 

 the anal fin to that of the dorsal, four of the series being above the lateral line. Origin 

 of the dorsal fin midway between the root of the caudal and the scapula ; origin of tlie 

 anal nearer to the end of the snout than to the root of the caudal. A round black spot 

 on the scapula. 



A specimen, 8 inches long, was found by Messrs. Dow and Salvin on the Pacific coast 

 of Panama. 



272. PristktASTer dovii. 



Pristigaster aryenteus, Giiiitli. Proc. Zool. Soc. 186G, p. 603 (not Cuv.). 

 dovii, Giiiith. Fish. vii. p. 4(51. 



D. 11. A. 5(3. L. lat. 51. 



Abdominal profile but slightly convex, the greatest depth of the body being two- 

 sevenths of the total length (without caudal) ; the length of the head is nearly one-fifth 

 of the same. Eye large, its diameter being two-sevenths of the length of the head, and 

 two-thirds of that of the postorbital portion of the liead. There are eleven or twelve 

 scales in the transverse series ascending from tlie origin of the anal fin to that of the 

 dorsal, four of the series being above the lateral line. Origin of the dorsal fin mucli 

 nearer to the root of the caudal than to the scapula; origin of the anal midway between 

 the end of the snout and the root of the caudal. Scapula with an indistinct blackish 

 spot. 



A specimen, 8^ inches long, was found by Capt. Dow at Panama. 



273. C'LUPKA LIBERTATIS. 

 Meletta liherlutis, (iiinth. Proc. Zool. Soc. 1866, p. 603. 

 Clupea libertatis, Gunth. Fish. vii. p. 433. 



D. 17. A. I'J. L. lat. 48. 

 Closely allied to C. thrissa. The length of the head is contained tlirice and two- 



