28 THE CYPRINODONTS. 



The length of the dorsal fin and the slenderness of the rays behind the 

 first serve to distinguish this species from any other of the genus. 

 Florida. 



Cyprinodon Martae. 



Qfprinodon Martee Steind., 1876, Sb. Ac. Wien, LXXII, 1875, extr. p. 60; Jor., 1887, P. U. S. Mus., 

 IX, 564. 



D. 9 ; A. 10 ; V. 7 ; P. 16 ; LI. 26 ; Ltr. 9. 



Depth three and a half, and length of head four times the length of 

 the body. Eye three, snout three and two thirds, and forehead twice the 

 length of the head. Snout blunt. Teeth in a single row, tricuspid. Dorsal 

 origin a half length of the head nearer the insertion of the caudal than to 

 the end of the snout. Anal origin below the middle of the base of the 

 dorsal. Rays of dorsal and anal elongate in the male, those of the anal 

 reaching the short rays of the caudal. Base of ventrals nearer to snout than 

 to caudal ; longest ray as long as the head, reaching the anterior rays of the 

 anal. Pectorals as long as the head, reaching backward of the bases of the 

 ventrals. 



Front edge of the dorsal, on the male described, blackish ; three to four 

 of the hindmost rays of dorsal and anal banded alternately with light and 

 dark ; the bands appear on the basal fourth and less distinctly on the an- 

 terior rays. Two to three darker transverse bands on the caudal, hind- 

 most broadest. Back gray ; sides silver-white. 



Santa Marta, near the mouth of the Magdalena River. (Steindachner). 



Cyprinodon amazona. 



Cypritiodon amazona Eig., 1894, Ami. N. Y. Ac, VIT, 627. 



«D. 9 or 10; A. 12. 



"Scales 21 in the male, 24 or 25 in the females. Depth, 4-5; head, 

 3^-4. Eye large, longer than snout, 3 in head. Dorsal but slightly behind 

 ventrals ; anal much behind dorsal. Snout pointed. A silvery lateral band 

 from above the eye to the middle caudal rays. Above and below this are 

 brown bands extending the whole length to end of caudal, the lower one for- 

 ward to tip of snout. Male with a third dark band from the base of the pec- 

 toral to the tip of the first anal rays. Types : 18 specimens (one a male ?) ; 

 up to 23 mm. long. Lower Amazonas." From the description alone it is 

 hardly worth while to attempt determination of the distinctions between this 



