FAMILY XI. PCECILIID^E. 135 



55. Beloiiesox Kner. 



Belonesox Kner, Sitzgsber. Akadi. Wiss. Wien, 1860, XL, 419. 

 (Type, Belonesox belizanus Kner.) 



Body elongate, not much compressed; head broad, flat; jaws 

 much produced; mouth large; premaxillaries forming an elongate 

 triangular plate, but not ankylosed; mandible long, somewhat prom- 

 inent; each jaw with a broad band of cardiform teeth; anal fin before 

 dorsal; anal fin of male modified into an intromittent organ. 



125. Belonesox belizanus Kner. 



Belonesox belizanus Kner, Sitzungsber. Wiss. Wien, 1860, 419, 

 Balize: Giinther, Cat., vi, 33, 1866, Mexico; Lago de Peten: 

 Garman, Memoirs, Mus. Comp. Zool., xix, 1895, 80; Mexico: 

 Jordan & Evermann, Bull. 47, U. S. Nat. Mus., 1896, 684. 



Southern Mexico and Central America. (Boca del Rio; Otopa; 

 El Hule; Obispo; Perez.) 



Head 2 to 3 ; depth 5 to 6; D. 8 or 9; A. 10; scales 18-56 to 63. 

 Body elongate, not much compressed; head long, slender, and much 

 depressed forwards; interorbital area 3^ in head; upper surface of 

 premaxillary plate 3 in head; snout 2 in head; eye 5 to 5>; origin of 

 dorsal fin about opposite' last ray of anal, its distance from base of 

 caudal af in its distance to tip of snout ; pectoral 2-^ in head ; ventral 

 3 T *Q; caudal peduncle slightly compressed, its least depth 3 in head; 

 caudal fin rounded. 



Color light brownish, almost uniform above and below; the scales 

 on upper half of sidev each usually with a black center, forming dark, 

 interrupted lateral stripes 1 , a black spot at base of caudal. Length of 

 females about 8 inches; the males less than half as large as females 



One female 7^ inches in length, taken at Obispo, contained 129 

 young, each .85 inch in length; a second female 4.35 inches in length 

 contained 26 eggs in which the eye spots and outline of the young were 

 formed. With the possible exception of Goodea luitpoldi, this is the 

 largest member of the family in Mexico. 



Subfamily Anablepinae. 

 56. Anableps (Artedi) Bloch. 

 FOUR-EYED FISHES; CUATRO Ojos. 

 Anableps (Artedi) Bloch, Ichthylogia, vm, 7, 1795. (Type, Ana- 



bleps tetropthalmus Bloch =Cobitis anableps Linnaeus.) 

 Body elongate, depressed anteriorly, compressed posteriorly; head 

 broad and depressed, with the supraorbital part very much raised; 

 cleft of mouth horizontal, of moderate width; both jaws armed with a 



