636 Notes on some South American Fishes. 



male but slightly in front of the origin of the dorsal. Brown, longitudinal 

 streaks becoming individual spots on each scale on the caudal peduncle. 



32 males and 45 females from Rio Grande do Sul. 



PCECILIAI 



The three following species have hitherto been placed in the 

 ^enus Girardinus. But, as their discoverer claimed, they certainly 

 have more than one series of teeth. The anterior series consists 

 of flat incisors, and they would thus also be excluded from Poecilia. 

 A close inspection has shown however that the anterior series of 

 teeth of species of Poecilia are not truly conical, but are more or 

 less flattened, but without broadened tips. The anterior teeth of 

 the foUowinf^ three species differ from these only in degree, and I 

 have thought best not to create a new genus for them. 



Poecilia caiidomaculatus (Hensel). 



Viviparous ; anal of the male advanced and transformed into a long sword- 

 shaped intromittant organ. Each jaw with a series of spatulate incisors with 

 obliquely truncated, entire cutting edge, and much narrowed base. Behind 

 these one irregular or two series of much smaller conical teeth. Bones of the 

 lower jaw firmly united. Intestinal canal about Ij times as long as the body. 

 D. 8 ; A. 10; Lat. 1. 27—30. Head 3|— 4; depth 3^—4^. Dorsal equidistant 

 from caudal and from occiput ; anal in female partly under the dorsal ; third 

 anal ray in male most modified and enlarged, origin of the anal equidistant 

 from origin of dorsal and from tip of snout. 



A conspicuous vertical black bar below last dorsal rays, margined by light 

 in front and behind. Much narrower and fainter vertical lines behind and 

 in front of it, these scarcely evident in female. Two horizontal black bands 

 in the dorsal of the male ; one on the margin and one near the middle of the 

 fin ; much reduced in the female. 



9 males and 18 females from Rio Grande do Sul. 



Poecilia januariiis (Hensel). 



Girardinus januarius Hensel, Wiegman's Arch., 1868, Vol. II, 360 (Rio Janeiro). 

 Girardinus iheringii Boulenger, Ann. & Mag. Nat. Hist., 1889, 206 (Rio Grande 

 do Sul). 



D. 9 ; A. 10 ; Lat. 1. 27—30; Head 3^—4; depth 3|— 4. Dorsal equidistant 

 from caudal and from eye ; placed little behind origin of the anal in the 

 female ; anal in male 2 in the length. Six to eight vertical lines on the tail, 

 those of the caudal peduncle usually interrupted, several shorter lines on the 

 sides of the abdomen, above the lateral line. 



