JULY, 1907. FISHES OF GREAT LAKES, NICARAGUA MEEK. 109 



species. Some are quite slender, others deeper. The lateral band is 

 more prominent on some individuals than on others. The two 

 humeral spots may be present on one side, and but one present on 

 the other. A comparison of the material listed below with a con- 

 siderable number of specimens from Caballo Blanco, San Jose del 

 Idolo, Lake Amatitlan and El Rancho, Guatemala, show no con- 

 stant differences. 



Tetragonopterus humilis Giinther, Cat., v, 325, 1864, Lake Amatit- 

 lan, Guatemala, is evidently based upon a slender specimen of this 

 species. 



This species is very abundant in Lakes ..Managua and Nicaragua. 

 It does not occur in Lake Tiscapa. 



Momotomba (47), 55 to 115 mm.; Managua (165), 55 to 100 mm.; 

 San Francisco (2), 60 and 65 mm.; Granada (25), 75 to no mm.; 

 Cisplaya (6), 45 to 65 mm. 



Genus Brycoii Miiller & Troschel. 



Brycon dentex (Giinther). SABALO. 



Chalcinopsis dentex Gill & Bransford, Proc. Acad. Nat. Sci., Phila., 

 18-77, J 88, Lake Nicaragua. 



Head 4.1; depth 3.6; D. 10; A. 35; scales 17-54. Body elongate, 

 compressed ; dorsal and ventral outline about evenly convex ; profile 

 from nape to end of snout very slightly concave ; upper jaw project- 

 ing, exposing two series of teeth ; teeth of upper jaw with three series 

 of tri cuspid teeth, the two outer series small and in the portion 

 of upper jaw usually projecting beyond the lower; the posterior 

 series large and opposed to the single row of three to five cuspid teeth 

 on edge of maxillary; gill rakers long and slender, 12 +13 ; maxillary 

 long and slender, extending to vertical from middle of eye, its length 

 2.1 in head; snout pointed, overhanging the mouth, its length 3.6 in 

 head; adipose eyelid slightly developed; diameter of eye 3.1 to 3.6 

 in head; mandible strong, 2.2 in head; origin of dorsal over middle 

 of space between origin of ventral and anal fins, its distance from 

 end of snout 1.8 in body; origin of anal under last dorsal rays, its 

 distance from snout 1.6 in body; base of dorsal 2.1 in head, its height 

 1.4; base of anal 3.2 to 3.3 in body; tip of pectoral nearly reaching 

 ventrals; ventrals to vent; no lateral line. 



Color silvery below, dark bluish above; fins all plain. 



This species is said to grow to a length of a foot or more. It is 

 considered a good food fish, and it is often dried and marketed in that 



