404 MEMOIRS OF THE CARNEGIE MUSEUM 



Head 3.66-3.75; depth 3; D. 11; A. 42-47; scales 19-91 to 98-15; eye 1 in 

 the snout, 3.33 in the head, 1 in the interorbital. 



Compressed, tail slender, predorsal region of the body heavy; predorsal profile 

 arched to the occipital process, depressed over the eyes; preventral area rounded, 

 with many small scales; postventral area broad but with a trenchant median keel; 

 predorsal area rounded, entirely scaled. Fontanel reaching to above anterior 

 margin of the pupil; mouth large, premaxillary-maxillary border without an angle, 

 1.33-1.4 in the length of the head; maxillary extending far beyond the first sub- 

 orbital; second suborbital leaving a wide naked margin below. 



Maxillary with about sixty minute teeth, the uppermost ones largest, but no 

 canines; premaxillary with an outer series of about ten teeth, of which the first 

 and last are large canines, an inner series of two small canines opposite the fifth 

 and seventh teeth of the outer series; each ramus of the lower jaw with four canines 

 in front, of these the second is the smallest, the third much the largest, the first and 

 fourth of about the same size, and about thirty graduated conical teeth on the sides. 



Gill-rakers 2 + 6, the middle one heavy, half as long as the eye. 



Scales largest about the origin of the lateral line, decreasing most rapidly to in 

 front of the dorsal; about forty rows of scales in front of the dorsal; fins naked; 

 lateral line almost straight; surface of each scale with numerous denticles (as many 

 as one hundred on the largest scales of one of the larger specimens) arranged in more 

 or less regular series. 



Dorsal pointed, its origin in front of the middle, its height 4 in the length; 

 caudal lobes short, 4.5 in the length; anal slightly emarginate in front, the origin 

 and the middle of the dorsal equidistant from the snout, a little nearer to base of 

 middle caudal rays than to tip of snout; ventrals reaching the anal in the young, 

 falling short of it in the adult; pectoral reaching beyond origin of ventrals. 



A silvery lateral band; a dusky circular caudal spot at the end of the caudal 

 peduncle; a large conspicuous triangular humeral spot, its base just above the 

 fifth to the ninth scales of the lateral line, its apex on about the seventh row of 

 scales above the lateral line. 



ACANTHOCHARAX 62 gen. 110 V. 



Type, Acanthocharax microlepis sp. nov. 



Lateral line complete; origin of anal under the dorsal; scales moderate, 

 cycloid; a strong spine on the angle of the preopercle, continuous with the margin 

 of the lower limb; a small canine at the upper end of the maxillary, its margin with 



62 &Kav0a, a thorn; x<v<*£, name of the typical genus. 



