42 THE CYPRINODONTS. 



Glaridodon latidens sp. n. 



Plate V. Fig. 11, teeth. 



B. 5 ; D. 8 ; A. 10 ; V. 6 ; P. 12 ; LI. 28-30 ; Ltr. 8 ; Vert. 13 + 19. 



Moderately elongate, compressed, caudal pedicel comparatively deep. 

 Head little more thau depth, more than one fom'th of the length to the base 

 of the caudal, flattened on the crown. Snout short, blunt, rounded ; chin 

 very steep. Mouth rather wide, arched transversely, directed upward ; lower 

 jaws longer, firmly united ; upper short, protractile. Teeth chisel shaped, 

 hooked and strong in the outer series ; inner teeth in bands, pointed, com- 

 monly expanded near the apex as if two or three cusped ; pharyngeal valu- 

 ing in shapes, larger with hook and shoulder. Eye large, longer than snout, 

 two thirds of forehead, one third of head. Dorsal origin little behind the 

 middle of the total length, above the middle of the base of the anal. Ven- 

 trals very small, not reaching anal. Pectorals moderate, reaching behind 

 bases of ventrals. Caudal as long as the head, subtruncate or convex. Scales 

 large. 



Light olivaceous, darker on back, silvery on opercles, throat, and belly, 

 apparently somewhat lighter along the middle of the flank ; with narrow 

 vertical bars of brown on the sides, more distinct behind the abdomen, one 

 of them situated below the hind extremity of the base of the dorsal. Fins 

 clouded with brownish. Top of head dark. A dark line from anal to caudal ; 

 in cases a similar line on the middle of the side. The brown color is in punc- 

 ticulations, sometimes arranged toward the edges of the scales. 



Chihuahua, Mexico. 



Glaridodon januarius. 



Plate V. Fig. 8, teeth; Plate VIII. Fig. 15, male. 



Gimrdinus januarius Hens., 1868, Arch. f. Nat., XXXIV, 360,-1869, Arch. f. Nat., XXXV, 89; 

 Eig., 1891, P. U. S. Mus., XIV, 65. 



Pxcilia januarius Eig., 1894, Ann. N. Y. Ac, VII, 636. 



Girardinus caudimaculutus Hens., 1868, Arch. f. Nat., XXXIV, 362,-1869, Arch. f. Nat., XXXV, 

 89 ; Iher., 1883, Zeitsch. f. wiss. Zool., XXXVIII, 468, pi. 26 ; Eig., 1891, P. U. S. Mus., XIV, 65 ; Cope, 

 1894, Ann. N. Y. Lye, VII, 636. 



Girardinus iheringii Blgr., 18S9, Ann. N. H., Oct., 266, Eig., 1891, P. U. S. Mus., XIV, 65. 



.'' Gambusia gracilis Perug., 1891, Ann. Mus. Civ. Gen., X (2), 652. 



Pacilia caudomaculatus Eig., 1894, Ann. N. Y. Ac, VII, 636. 



B. 5 ; D. 8-9 ; A. 9-11 ; V. 5-6 ; P. 10-12 ; LI. 28-31 ; Ltr. 8 ; Vert. 

 14 + 18. 



Form somewhat resembling that of Gamlntsia Holbrookii. Stout, well 



rounded, depressed anteriorly, compressed behind the head. Head nearly 



