Jordan and Evennann. Fishes of North America. -1 1 :,:, 





1008 (c). XEXEXDl M X ALISC 0\E, Jordan & Snyder. 



Head 4? ; depth 3^; depth of caudal peduncle 6i; eye 3ff in head; snout 

 3; interorbital space 1; height of dorsal 6 A- in length; anal 9; length of 

 pectoral 5; ventral 7^; caudal 5; D. 13; A. 14; scales 42, transverse 

 series, counting upward and forward from origin of anal, 17; on caudal 

 peduncle 12. Body thick set, deepest at origin of ventrals, widest at bases 

 of pectorals; caudal peduncle deep and long; head large and pointed; 

 interorbital space broad, slightly convex; mouth vertical, its width equal 

 to length of snout; maxillary very protractile; teeth loosely attached, 

 broader at distal ends than at bases, bicuspid, in two rows on each jaw; 

 no villiforni teeth present ; gill openings extending above base of pectorals 

 a distance about equal to diameter of pupil; gill-rakers long, flat, very 

 close together, 56 on lirst arch. Alimentary canal long, in many folds; 

 peritoneum black. Dorsal fin inserted posteriorly, first ray simple, closely 

 attached to second; edge of fin rounded; anal inserted on a vertical pass- 

 ing through the base of fourth dorsal ray, similar to dorsal in shape; 

 pectoral and ventral fins rounded; edge of caudal a little convex; basal 

 fourth with scales. Scales large, everywhere on body and head, except 

 lower jaw and preorbital area; no lateral line. Color plain, dark above, 

 light below, the dark color leaving off rather abruptly on the head along 

 a line passing through lower edge of eye ; on the body, along a line passing- 

 from lower edge of base of pectoral to caudal, leaving lower one-fifth of 

 caudal peduncle light; faint traces of a dark spot at base of each scale on 

 dorsal region of body ; all the fins, except ventrals, dusky. Laguna de 

 Chapala, Mexico. 



One male individual was taken. It resembles the female in general 

 appearance. The anal fin is not advanced nor modified into an intromit- 

 teufc organ. Although it is injured, it shows that the first 5 or 6 rays were 

 close together and shortened. 



Xcnendum xaUscone differs from X. caliente in not having villiform teeth, 

 in having more scales in the lateral and transverse series, and on the caudal 

 peduncle. It differs from X. hiitpoldii (Steindachner), which is the third 

 known species of the genus, in having a much longer snout, a more pointed 

 head, and in not having villiform teeth. (Jordan & Snyder.) 



Known only from Laguna de Chapala, near Ocotlan, Jalisco, Mexico. 

 (Type, a female, No. 6148, L. S. Jr. Univ. Mus. Coll. J. O. Snyder.) 



(Name from Jalisco, the type locality.) 



Xenendum xaUscone, JORDAN & SNYDER, Bull. U. S. Fish Com. 1899 (1900), 129, Laguna 

 de Chapala, Mexico. 



Page 698. Before MoUienisia, Le Sueur, insert: 



1037 (a). POECILIA LDIAXTOUR1, Jordan & Snyder. 



Head 3 in length; depth 3; depth of caudal peduncle 4f; eye 3 in 

 head; snout 3; interorbital space 2; height of dorsal 5 in length; anal 

 H; length of pectoral <U; ventral 6; caudal 3A; D. 9; A. 8; scales 26-9, 

 8 on caudal peduncle. Body rather deep and compressed; dorsal out- 

 line angular, its highest point at insertion of dorsal; lowest point of 



