98 IIAPLO^II. 



Ilah. Mexico, Mountain Lakes and Streams of Central Vera Cruz : 



Lake Alcohuaca, near Huamantki, SOOU feet ^ [Jones); Orizaba ■* ^^ '^ [Woolnian, 

 Gadoio). 



Of the numerous examples, measuring up to 85 mm. in total length, which I have 

 examined, the majority have 12 dorsal rays, in striking contrast to G. limaculata, in 

 which tlie usual number is 14 or 1-j. 



11. Gambusia bimaciilata. (Tab XIV. fig. 4.) 



XiphopliofKs himuadutas, Heck. Sitzuiit;s1). Ak. Wieu, i. 1818, p. 29G, t. 9. figs. 1-2 '. 

 PacUioides bimaculatva, Steiiid. Sitzuni^sb. Ak. Wicii, xlviii. 1863, p. 176, t. 4. fig. 2 ". 

 Pseudo.rip'io/i/ioriis reticvhttus, Trosch. in Miiller's lleise Mexico, iii. Append, p. lOi (1865) ^ ; Giiutli. 



Cat. Fish. vi. p. 33.3 (1866) ' ; Jovd. & Everm. Bidl. U.S. Nat. Mus. xlvii. 1896, p. 678°. 

 Pseudoxij)hiip/ioriis bimaculatns, Trosch. 1. c.^' ; Giinth. t. c. p. 382"; Garm. Mem. Mua. Comp. 



Zool. xix. 1895, p. 81 " ; Meek, Puhl. Columbian Mus., Zool. v. 190i, p. 127 ". 

 PticudoxiphojjhorKS bhnacuhitus, var. taniiatus, Regan, Ann. Mag. N. H. (7) xvi. 190.5, p. 362'". 



Depth of liody 3 to 4 in the length, length of head 3,1 to 4. 8nout as long as or a little slioiter than eye, the 

 diameter of which ia 3 to 3j- in the length of head. Iiitcrorbital width e(pial to the distance from middle 

 or posterior part of eye to free edge of operculum. ;^S-31 scales in a longitudinal series. Dorsal 13-17 ; 

 origin about equidistant from tip of snout and base of caudal. Anal 9-11, below the anterior dorsal rays, 

 pointed, the longest raj- from |- to as long as the head. Pectoral f to 4 the length of liead. Caudal 

 rounded. Least depth of caudal peduncle 4 to | the length of head. Olivaceous or brownish ; some or 

 all of tho scales with dark outlines ; a dark spot above the pectoral, another on the upper part of the base 

 of caudal ; dorsal with series of small dark spots ; anal and caudal dusky. 



II uh. SouTiiEKN Mexico, Tepeaca, San Domingo de Guzman ^'^ (Btdlcr), Jalapa", 

 Xico '', Orizaba 1 -^j Cordova [Boucard], Motzorongo ^5, El Hule ^, Obispo^, 

 Perez", Sanborn'^, Rio Tcmto {Gadoio); Britisu Honduras, Stann Creek 

 [Bohertson); Guatemala (Godmaii). 



A very variable species in form, coloration, and irumber of fin-rays. Specimens 

 from San Domingo de Guzman (var. tcvniatus) have 16 or 17 dorsal rays and the dark 

 edges of the mid-lateral series of scales so broad as to form a dark longitudinal band ; 

 one of these is figured (Tah. XIV. fig. 4). Examples from other localities appear 

 also to have peculiarities which may prove to be distinctive. The numerous specimens 

 examined measure up to UO mm. in total length. 



11. GLALIDICIITHYS, Gorman, 1896. 



(JlaniJidiUiijs, Carman, Am. Nat. xxx. 1896, p. 232. 



Vi\iparous. Anal fin, in the male, advanced and modified into a long intromittent organ. Mouth small or 

 moderate; rami of lower jaw firmly united; small teeth in bands, with an outer series of enlarged, 

 chisel-slKiped, fixed teeth. IJorsal fin short, with 8 to 11 rays. 



This genus comprises three species, respectively from Northern Mexico, Cuba, and 

 Ciazil. 



