344 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



reaching the front of the anal, in the females reaching the vent; pecto- 

 rals reaching past front of ventrals in both sexes. Color olivaceous, 

 the scales with dark edgings; a very distinct black baud in both sexes 

 running through eye and snout straight to the base of the caudal, 

 where it ends in a round black spot ; this band is about as wide as a 

 series of scales, although developed on parts of two series; a conspicu- 

 ous black band in both sexes along the lower edge of the caudal pedun- 

 cle, from the root of the caudal to the vent, dividing and passing on 

 each side of the anal fin ; fins in the female plain ; in the male, basal 

 half of dorsal and anal jet black, outer half pale with a black edge; 

 l^ectorals and especially ventrals also dark-edged ; caudal fin faintly 

 mottled ; vertical fins with more or less red in life. Head 4'; dei^th 4^. 

 D. 9; A. 9. L. 1^ inches. Arlington Eiver, Florida, a tributary of the 

 Saint John's. 



(Jordan, Proc. U. S. Nat. Mus. 1879, 240.) 



161.— GAITIBIJSIA Poey.* 



(Hcterandria Agassiz.) 



(Poey, Mem. Cuba, i, 382, 1851: type Gambusia punctata Poey, from Cuba.) 



Body moderately elongate. Mouth medium ; both jaws with a baud 

 of conical teeth ; snout not produced ; the lower jaw prominent. Eyes 



* PSEUDOXIPHOPHORUS Bleeker. 

 (Poeciliodes Steindacliner.) 



(Bleeker, Iclitliyol. lud. Prodr. Cypr. 1880,483: type Xipliopliorus himaculatus Hockel.) 

 This genus has the general characters of Gamhusia, differing in the larger size of 

 the dorsal fin, which has 14-16 rays instead of 6-10. Mexico. {ipevdoS, false; Xipho- 

 phorus. ) 

 * Anal process ending in a small hook. 



P. iimacnlatus (Heckel) Giinther. 



Each scale with a brown crescent; a black spot behind upper end of gill-opening, 

 and a round blackish sjiot on upper half of root of caudal. Head 4^; depth 4^. B. 6; 

 D. 14; A. 10; scales 29-8. ■ L. 4 inches. Mexico. (Gunther.) 



{Xi2)]i02)horu8 himacidatus Heckel, Sitzgsber. Akad. Wiss. Wien, 1848, 169; Gunther, 

 vi, 332.) 

 ** Anal process without hook. 



P. reticulatus Troschel. 



Coloration as in the preceding ; caudal fin entirely blackish. Depth G in total 

 length. D. 16; A. 8. Mexico. (Giinther.) 



(Troschel, Miiller's Rcise Mexico, iii, App. 104; Giinther, vi, 333.) 



BELONESOX Kner. 



(Kner, Sitzgsber. Akad. Wiss. Wien, 1860, xl, 419: type Belonesox helizanus Kner.) 



Cleft of the mouth much developed laterally, the jaw bones being much produced. 

 The intermaxiUariea form together an elongate triangular plate, but are not anchy- 



