322 PROCEEDINGS OF THE ACADEMY OF [Mai'ch 



margin of the gill-opening about equal to its length. Both profiles 

 are shghtly convex. Snout conic and rather short. Eye small, 

 well anterior, and high. Mouth small, horizontal, and the jaws about 

 equal. Maxillary small, and not reaching opposite the front rim of 

 the orbit. Lips rather fleshy, and the lower forming a free fold across 

 the mandible. Teeth uniserial, conic, and with a patch of villiform 

 ones directly behind. Nostrils well separated, high, and the anterior 

 midway between the tip of the snout and the front of the orbit. Inter- 

 orbital space convex. Preorbital a little over half the width of the 

 eye. 



Gill-opening carried forward below the anterior rim of the orbit. 

 ^ Scales rather large, finely ctenoid, and of about even size. Head 

 scaly, except the snout and interorbital space, and about five rows on 

 the cheek. Small scales along the bases of the fins, those along the 

 spinous dorsal forming a low sheath. Lateral line high at first, inter- 

 rupted below the posterior portion of the dorsal, then beginning on the 

 middle of the side and running over eleven scales in a straight line to 

 the base of the caudal. 



Fourth to seventh spines of dorsal even and highest. Longest dor- 

 sal rays a little longer than the longest spines. Last anal spines 

 longest, and a little shorter than the longest anal rays. Caudal trun- 

 cate, with rounded corners. Pectoral rather long, reaching opposite 

 the origin of the spinous anal. Ventral inserted a little behind the 

 origin of the pectoral and reaching almost to the origin of the spinous 

 anal. 



Color in alcohol more or less olivaceous-brown, with about nine 

 broad darker vertical bands fading out below. The one at the end of 

 the pectoral with a black blotch, and another black blotch at the base 

 of the median caudal rays. Fins dull olivaceous-dusky, the ventrals 

 somewhat paler. Lower surface of the body pale. 



Length If inches. 



Type No. 24,242, A. N. S. P. Victoria, on the Victoria river, a tribu- 

 tary of the Rio Soto la Marina, Tamauhpas, Mexico. Coll. S. N. 

 Rhoads. 



One example. This species is very close to Heros pavonaceus Gar- 

 man,^ differing in the fin radii, the fewer vertical bands and only having 

 two black blotches on the sides. The first of these is placed at the 

 end of the pectoral just below the lateral fine, and the other at the 

 middle of the base of the caudal. In Heros pavonaceus they are more 



^ Bull. Mus. Comp. Zool., VIII, p. 93; from a spring near Monclova (Coll. Dr. 

 Palmer). 



