104 HAPLOML 



5. Poecilia salvatoris. (Tab. XIV. figg. 2, 3.) 



PcecUia thermahs (non Steiiid.), Giinth. Cat. Fish. vi. p. 3-11 (1866)'; Jord. & Everm. Bull. U.S. 



Nat. Mus. xJvii. 1896, p. 693 \ 

 Pa-cilia salvatoris, Began, Ann. Mag. Nat. Hist. (7) xix. 1907, p. 65 \ 



Depth of body 3] to 3| in the length, length of head about 3|. Snout shorter than eye, the diameter of 

 which is 3| in the length of head. Intcrorbital width equal to the distance from anterior part or middle 

 of eye to free edge of operculum. 27 to 30 scales in a longitudinal series. Dorsal lU-11 ; origin 

 equidistant from tip of snout and middle or posterior part of caudal ( 2 ) ; anterior angle rectangular, 

 free edge of the fin straight, the rays gradually decreasing in length from the first branched ray 

 backwards ( J ). Anal 8-9 ; origin below or a little behind that of the dorsal. Pectoral a little 

 shorter than the head. Caudal subtruncate. Least depth of caudal peduncle from ^(2) to 7; ( d ) the 

 length of head. Olivaceous ; males with more or less distinct cross-bars ; dorsal fin, in the males, with 

 2 series of vertically expanded blackish spots, which maj' or may not be present in the females ; 

 caudal, in the males, with oblong spots. 



Ilab. Saltadoe (Doiv ^ ^). 



Here described from several specimens, measuring up to 55 mm. in total length. 



6. Poecilia petenensis. 



Pacilia petenensis, Giintli. Cat, Fish. vi. p. 342 (1866) \ and Trans. Zool. Soc. vi. 1868, p. 484, 

 t. 85. figs. 3 & 4'^ ; Jord. & Everm. Bull. U.S. Nat. Mas. xlvii. 1893, p. 694'. 



Depth of body 3 j ( r? ) to 4.3 ( J ) in the length, length of head 4|- to 4|. Snout as long as eye, the diameter 

 of which is ;ii to 3j in the length of head. Interorbital width equal to the distance from the middle 

 or posterior part of eye to the free edge of operculum. 2S to 30 scales in a longitudinal series. 

 Dorsal 10-11 ; anterior angle rectangular, free edge straight ( J ) ; origin equidistant from tip of snout 

 and base of caudal ($ ), x\nal 8-9, acutely pointed ; origin below the fourth or fifth dorsal ray ( J ). 

 Pectoral as long as the head. Caudal rounded. Least depth of caudal peduncle nearly equal to the 

 length of head ( cj ) or about | the length of head ( 2 )• Greenish ; scales on the ui)per part of the body 

 with dark edges ; dorsal and caudal blackish ( cJ ) or with small dark spots ( 2 ). 



Ilab. Guatemala, Lalve Peten [Sahin ^ ~). 



Here described from the types, five specimens measuring up to 150 mm. in total 

 length. 



7. Poecilia coiicliiana. (Tab. XIV. fig. 1.) 



Liinia, coucldana, Girard, Proc. Ac. Philad. 1859, p. 116 \ 

 Pacilia couchii, Giinth. Cat. Fish. vi. p. 347 (186G) ". 



Piecilia cu'uchiu'iw, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 695 '' ; Meek, Publ. Columbian 

 Mus., Zool. v. 190-1, p. 152'. 



Depth of body about 2^ in the length, length of head about 4. Snout a little shorter than eye, the diameter 

 of which is 3 in the length of head. Interorbital width equal to the distance from anterior part of eye 

 to free edge of npci'culum. 24 to 27 scales in a longitudinal series. Dorsal 9-11; origin equidistant 

 from tip of snout and anterior part of caudal ( 2 ) ; free edge of fin nearly straight, the branched ravs 

 subequal ( 2 )• Anal 7-8, pointed, opposite to the posterior half of the dorsal ( 2 ). Pectoral nearly as 

 luns as the head. Caudal rounded or subtruucatc. Least depth of caudal peduncle | to 4 the length 

 of head. Upper half of body dark brownish or blackish, the colour especiallv dark at the edi-es of the 

 scales : lower part of body usually yellowish and sharply separated from the darker upper part at 

 ihj lower edge of which there may be a blackish longitudinal band. 



