374 On some Fishes of the Family roecilildffi. 



27 scales in a longitudinal series. Dorsal 11— 13 ; branched 

 rays subequal in length or slightly decreasing backwards. 

 Anal 9-10. Least depth of caudal peduncle less than the 

 distance from end of dorsal to base of caudal fin. Olivaceous ; 

 2 or 3 brownish longitudinal stripes at the edges of tlie series 

 of scales on the sides of the body ; dorsal and caudal fins 

 yellow at the base ; a pair of conspicuous blackish spots, one 

 above and one below, at the base of the caudal fin. 



Six examples, 40 to 65 mm. in length, of this pretty little 

 aquarium fish have been sent to me by Herr A. Rachow, of 

 Hamburg. They came from Porto Barrios, on the Atlantic 

 coast of Guatemala, between Lake Yzabal and the Rio 

 Motagua. This new species is closely related to X. brevis, 

 Regan, from British Honduras. 



2. The Poeciliid Fishes of Celebes and Lombok. 



The Poeciliid fishes known from Celebes belong to two 

 species — Ilaplochilus celebensis, M. Weber (Zool. Ergebn. iii. 

 1894, p. 426), which seems from the description to be a true 

 Uaplochilus, and H. sarasinorum, Popta (Notes Leyden Mus. 

 XXV. 1905, p. 239), for which I propose the new generic name 

 Xenopoecilus. The small scales and the 7-rayed pelvic fins 

 distinguish Xenopcecihis from both Uaplochilus and Panchax. 

 It appears to resemble Uaplochilus in the high position of the 

 pectoral fins and the non-protractile mouth, but is nearer 

 Panchax in the form of tlie mouth, which has a distinct 

 lateral cleft, and in the dentition, the jaws being furnished 

 with bands of teeth. 



That Celebes should possess a peculiar genus of Poeciliid 

 fishes is not surprising ; but Professor Max Weber attaches 

 some importance to the presence in this island of a species of 

 the Asiatic genus Haplochilus, which he regards as true fresh- 

 water fishes. But Day ('Fishes of India,' p. 522) has 

 pointed out tliat the species of Panchax and Uaplochilus 

 occur in lowland streams and estuaries, rarely far from the 

 sea, and Duncker (Mitteilung. Naturhistorisch. Mus. Ham- 

 burg, xxi. 1904, p. 171) has recorded Uaplochilus javanicus, 

 Bleek., as a brackish-water fish. It seems probable that the 

 species of Uaplochilus, like so many Poeciliidge, sometimes 

 enter the sea, or, at least, that salt water does not constitute 

 an impassable barrier for them. 



A species of Uaplochilus has been recorded from Lombok 

 (M. Weber, Res. Exped. Neerl. Nouvelle Guin^e, Zool. v. 

 1907, p. 218), but seems never to have been exactly deter- 

 mined or described. 



