FAMILY XL PCECILIID^;. 123 



each with a dusky subterminal bar; a narrow dark line along middle of 

 each row of scales on the back ; females with several short dark bars on 

 the posterior halt of the body; some dark specks on caudal peduncle. 

 (Jordan & Evermann.) 



49. Chapaliclithys Meek. 



Chapalichthys Meek, Field Col. Mus. Pub. 65, 1902, 97. (Type, 

 Characodon encaustus Jordan & Snyder.) 



Body rather deep, compressed; caudal peduncle long and slender; 

 about half to three-fourths of the dorsal fin in front of oiigin of anal; 

 origin of dorsal fin midway between base of caudal and anterior 

 margin of the orbit ; dorsal fin of male higher than that of female; anal 

 fin with its first five or six rays short and stiff and separated from the rest 

 of the fin by a shallow notch; teeth in 2 series, the outer enlarged, 

 bicuspid and firmly attached; the inner series small, and in small 

 patches; alimentary canal elongate, convolute or irregularly in 3 coils 

 on the right side, its length nearly twice the length of the fish; peri- 

 toneum black, caudal fin truncate; gill rakers long and slender; verte- 

 brae 18-1-19=37; viviparous. 



This genus has the long alimentary canal of Goodea and the firm 

 bicuspid teeth of Characodon; the dorsal fin is considerably more ad- 

 vanced in this genus than either Goodea or Characodon. 



112. Chapalichthys encaustus (Jordan & Snyder). 



Characodon cncaustus Jordan & Snyder, Bull. U. S. Fish Comm., 

 1900, 126, fig. 7, Lago de Chapala, Ocotlan, Jalisco: Jordan & 

 Evermaim, Bull. 47, U. S. Nat. Mus., 1901, 3150; Pellegrin, 

 Bull. Mus. Hist. Nat. Paris, 1901, 205; Estado de Jalisco. 



Chapalichthys enraiistus Meek, Field Col. Mus. Pub. 65, 1902, 97; 

 La Barca; Ocotlan; La Palma. 



Basin of the Rio Lerma. 



FIG. 36. CHAPALICHTHYS ENCAUSTUS (Jordan & Snyder). 



No. 6163, Leland Stanford Jr. University. 



Head 3^ to 3$; depth 3^ to 3^; D. 16; A. 15 or 16, scales 13- 

 34 or 35. Body oblong, compressed; head moderate; interorbital area 

 nearly flat, its width 2f in head; lower jaw the longer; chin promi- 



