354 CVPErNODONTIB^". 



that of the head, and two-thirds of the width of the interorbital space, 

 which is slightly concave. In the female the origin of the dorsal 

 fin is in the micldle of the total length, and conspicuonsly behind that 

 of the anal fin. Caudal fin largo, longer than the head, subtruncate 

 behind ; the free portion of the tail is somewhat elongate, the length 

 of the base of the anal being one-third of its distance from the caudal. 

 Pectoral fin not quite as long as the head, and not extending so far 

 backwards as the ventral fins, which reach the vent. 



In the male the origin of the dorsal is somewhat nearer the ex- 

 tremity of the caudal than that of the snout ; the anal process is 

 quite straight, nearly twice as long as the head, and terminating in 

 a simple tapering point. Caudal very short. Ileddish ohve, a series 

 of six or seven roimd blackish spots, each about the size of the eye, 

 runs along the middle of the side ; a black Une along the base of the 

 anal fin, and the lower and upper margins of the tail. Caudal fin 

 with two indistinct dark cross bands. 



Guatemala. 

 o. Numerous females, from 1| to 2 inches long, and one adult male, 

 1 inch long. Lake of Dueaas. From Mr. Salvin's Collection. 



7. Girardinus formosus. 



Girard, Proc. Acad Nat. Sc. PMlad. 1859, p. 62. 

 D. 7. A. 9. L. lat. 28. 



Head a little less than one-fourth of the entire length ; snout very 

 short ; the diameter of the eye two-fifths, or at most one-third, of 

 the length of the head. Origin of the dorsal fin nearly equidistant 

 between the extremities of the snout and of the caudal. Anal some- 

 what smaller than the dorsal, its origin being somewhat in advance 

 of the dorsal. Pectorals extending beyond the root of the ventrals ; 

 ventrals reaching the vent. Brownish oHve, with a black streak 

 from the snout, along the middle of the side, crossed by six or eight 

 brownish-black vertical streaks ; a black spot at the base of the 

 caudal, dorsal, and anal. 



Florida and South Carolina. 



Female, 1 inch long. Male ^ inch. 



8. Girardinus occidentalis. 



Heterandria occidentalis, Baird Sf Girard, P)-oc. Acad. Nat. Sc. PhiJad. 



1853, p. 390. 

 Girardinus occidentalis, Girard, U. S. Sf Mex. Poimd. Ichth. p. 73, 



pi. 39. figs. 16-19; and Proc. Acad. Nat. Sc. PMlad. 1859, p. 119, 



D. 7. A. 7. V. 6. 

 The height of the body is about equal to the length of the head, 

 which is somewhat more than one-fourth of the total (without 

 caudal) ; in the female the origin of the dorsal fin is somewhat nearer 

 to the extremity of the snout than to that of the caudal, and nearly 

 opposite to the origin of the anal. Free portion of the tail elongate. 

 Eeddish brown above, with a more or less distinct black stripe along 



