986 MR. C. TATE REGAX OX 



origin above or a little behind posterior end of anal, twice as far 

 from middle of eye as from base of caudal ; longest rays |- or |- 

 length of head. Anal 11 ; second branched ray longest, edge of 

 fin emarginate. Pectoral a little shorter than head ; peivics 

 reaching vent or origin of anal. Least depth of caudal peduncle 

 •| lengtli of head. Upper part of body with 2 or 3 series of small 

 dark spots along the rows of scales ; doi'sal and caudal fins 

 spotted. 



(5. Origin of dorsal fin twice as distant from end of snout as 

 from base of caudal. 



Southern Mexico ; Nicaragua. 



Several females, 40 to 55 mm. in total length, and two males 

 of 30 mm., including the types from Lake Nicaragua, and speci- 

 mens from El Hule {Meek) and Coaxacoalcos [Arnold). 



6. Gambusia dovii, sp. n. 



$ . Depth of body 3|- in the length, length of head 3^^. Dia- 

 meter of eye 3^ in length of head, interorbital width 1|^. 32 scales 

 in a longitudinal series. Dorsal 7 ; origin behind end of anal, 

 twice as far from end of snout as from base of caudal. Anal 10 ; 

 anterior branched rays longest, but edge not emarginate. Least 

 depth of caudal peduncle slightly more than -J- length of head. 

 Olivaceous ; traces of spots on back and on caudal fin. 



Lake Nicaragua. 



A single specimen of 33 mm., collected by Captain Dow. 



7. Gambusia oaudovittata . 



Regan, Ann. Mag. Nat. Hist. (8) xii. 1913, p. 471. 

 Recently described from a. single specimen from the Condoto, 

 a tributary of the San Juan, W. Colombia. 



8. Gambusia punctata. (Text-fig. 168 D.) 



Gambusia punctata Poey, Mem. i. p. 384 (1855); Giinth. 

 Cat. Fish. vi. p. 334 (1866); Jord. & Everm. Bull. U.S. Nat. 

 Mus. xlvii. 1896, p. 680. 



2 . Depth of body 3 to 4 in the length, length of head 3^ 

 to 4. Diameter of eye 3 to 3^ in length of head, interorbital 

 width 2. 31 to 33 scales in a longitudinal series. Dorsal 10 ; 

 origin above posterior end of anal, nearer to base of caudal than 

 to head ; longest rays f to ^ the length of head. Anal 11 ; last 

 simple or first branched ray longest ; edge of fin str-aight or 

 slightly emarginate. Pectoral | length of head ; peivics reaching 

 vent. Least depth of caudal peduncle ^ to |- length of head. 

 Upper part of side with a dark spot on each scale, forming 3 to 5 

 regular longitudinal series ; usually small dark spots on dorsal 

 and caudal. 



S. Dorsal origin about equidistant from head and base of 

 caudal ; longest rays \ length of head. 



Cuba. 



Here described from 16 females, measui-ing up to 85 mm. in 

 total length, and 3 males of 40 to 50 mm. 



