CYPEINODON.— ZOOGONETICUS. 85 



Here described from specimens from Florida, measuring up to 70 mm. in total 

 length. 



4. Cyprinodon macularius. 



Cyprinodon macularius, Baird & Girartl, Proc. Ac. Pliilad. 1853, p. 389'; Girard, U.S. & Mex. 



Bound. Surv., Fish. p. 68, t. 37. figs. 8-11 (1859) '; Garai. Mem. Mus. Comp. Zool. xix. 



1895, p. 2-1'; Gilb. N. Amer. Fauna, no. 7, p. 23.2 (1893) '; Jord. & Everm. Ball. U.S. 



Nat. Mus. xlvii. 1896, p. 674'; Gilb. & Scofield, Proc. U.S. Nat. Mus. 1898, p. 498 " ; 



Meek, Pubb Columbian Mus., Zool. v. 1904, p. 126 '. 

 Ci/prinodon calif orniensis, Girard, Proc. Ac. Philad. 1859, p. 157". 

 Cyprinodon nevadensis, Eigcnm. Proc. Calif. Ac. Sci. (2) i. 1889, p. 270". 



Depth of body '2^ to 2| in the length, length of head 3. Snout a little shorter than eye, the diameter of 

 which is 3 to 3j in the length of head ; interorbital width 2j in the length of head. 25 or 26 scales in 

 a longitudinal aeries. Dorsal 10-11 ; longest rays equal to the base of the fin ( cj' ) or a little less ( ? ), 

 |((5)ori(5) the length of head, scarcely longer than the longest anal rays. Anal 10-11. Pectoral 

 4 the length of head. Caudal subtruncate. Least depth of caudal peduncle -| the length of head. 

 Body with irregular dark cross-bars and an interrupted lateral band, these markings scarcelj- distinct 

 in males ; the caudal fin and sometimes the dorsal and anal with a narrow dark edge (in the males), 

 the dorsal with a small dark spot on the posterior rays (in the females). 



Ilah. Colorado and Nevada to Sonora and Lower California: 



Colorado ; Nevada ^ ^ ; California ^ s » ; Arizona i ^ ■ Sonora ■' '\ , 



Here described from five specimens from Colorado [Eigenmann) and Lower 

 California, measuring up to 60 mm. in total length. 



5. ZOOGONETICUS, Meek, 1902. 



Zoogoneticus, Meek, Publ. Columbian Mus., Zool. v. 1904, p. 109. 



Viviparous. Anal fin of the male with the anterior five or six ra3's short, stiff, and subequal, separated by a 

 more or less distinct notch from the rest of the fin. Mouth rather small, with short lateral cleft ; rami 

 of the lower jaw firmly united; miuute teeth in bands, with an outer series of enlarged, fixed, conical 

 teeth. 



This genus comprises four species, from the Rio Lerma System and the Valley 

 of Mexico. It is very closely related to Fimduli of the type of F. punctatus, 

 F. pachycephalus, &c. 



Syno])sis of the Species. 



I. 28 to 30 scales in a longitudinal series. 



Dorsal 13-16; origin about equidistant from tip of snout and posterior 



end of caudal fin. Anal 13-15 1. cuit-eoensis. 



Dorsal 17; origin nearer to end of caudal than to tip of snout. Anal 13 . 2. dugcsii. 



II. 32 to 34 scales in a longitudinal series 3. diazi. 



III. 36 to 39 scales in a longitudinal series 4. robustus. 



