506 



PROCEEDINGS OF THE ACADEMY OF 



[Sept., 



humeral blotch is indistinct. B. scapularis differs also from all the 

 species mentioned in its vertically ellipsoid pupil. 



(Scapula, shoulder, referring to the shoulder-spot.) 

 Astyanax notemigonoides sp. nov. Fig. 4. 



Head 4; depth 2f ; D. in, 9; A. iv, 37, i; P. i, 13; V. i, 7; 

 scales 45 in 1. 1. to caudal base, and about 4 ? more on latter (squama- 

 tion slightly injured); 9 scales above 1. 1. to dorsal origin; 7 scales 

 below 1. 1. to ventral origin; 8 scales below 1. 1. to anal origin; 17 

 predorsal scales; head width 2 in its length; head depth at occiput 

 1 T V; mandible 2f ; first branched dorsal ray 1; first branched anal 

 ray 1^; least depth of caudal peduncle 2\; pectoral lyV; ventral 

 If; snout 4 in head measured from upper jaw tip; eye 3; maxillary 

 2f ; interorbital 3 T V 



Fig. 4. — Astyanax notemigonoides Fowler. Type. 



Body well compressed, lower profile deeper and more evenly 

 convex than upper, greatest depth at dorsal origin. Predorsal 

 region slightly trenchant with obsolete median keel. Postdorsal 

 region convexly rounded. Preventral region with slight median 

 keel, becomes obsolete and region flattened immediately before 

 ventral bases. Postventral slightly trenchant with median keel. 

 Postanal region convexly rounded. Caudal peduncle short, well 

 compressed, length about § least depth. 



Head moderate, well compressed, flattened sides becoming a little 

 constricted below, upper and lower surfaces convex, upper profile 



