140 Annals of the Carnegie Museum. 



cc. Lateral line 32-33, no lines or dots, large irregular blotches, ventral 



half of body darker 33. eigenmanni Haseman. 



hh. Origin of dorsal about opposite anal. A series of longitudinal rows of 



oblong spots 34. maculata (Regan). 



aa. Scales more than 18 between occiput and dorsal. Lateral line 32-35. 



35- pygogramma (Boulenger). 



34. Fitzroyia lineata (Jenyns). 



Lebias lineata Jenyns, Beagle Zool., Fishes, 1842, p. 116, pi. 22, fig. 2. 



Lebias muUidentata Jenyns, ibid., 1842, p. 117, pi. 22, fig. 3. 



Fitzroyia muUidentata Gunther, Cat. Fishes Brit. Mus., VL 1866, p. 307. 



Jenynsia lineata Gunther, ibid., 1866, p. 331; Garman, The Cyprinodonts, Mem. 

 Mus. Comp. Zool., XIX, 1895, p. 69, pi. VIH, fig. 2-3; Von Ihering, Siisswas- 

 serf. V. Rio Grande do Sul, 1893, P- 28; Lahille, Revista Mus. de la Plata, VL 

 1895, p. 275 (Arroyo del Gato); Boulenger, Boll. Mus. Torino., X, No. 279, 

 1897, p. 4; Regan, Ann. Mag. Nat. Hist., (8), XL 1913. p. 232. 



Jenynsia muUidentata Boulenger, Boll. Mus. Torino, X, 1897, p. 4 (Lesser, Tala.). 



Fitzroyia lineata Berg, Ann. Mus. Nac. Buenos Aires, V, 1897, p. 291. 



Fitzroyia lineata Eigenmann, Proc. U. S. Nat. Mus., XXXH, 1907, p. 430; Repts. 

 Princeton Univ. Exp. Patagonia, IH, 1910, p. 457. 



4670, C. M., seven, one male, six females, 44-66 mm. Rio Guahyba 



at Porto Alegre, Rio Grande do Sul. 



Range: La Plata to Rio Grande do Sul. 



Head 4-4.3; depth at origin of dorsal 4-4.5 .depth of caudal peduncle 

 7 in length to base of caudal and 1.8 in head. Eye 3 in head, equal to 

 interorbital. Snout 1.3 in eye. 



D. 8-9; A. 8; P. 14; V. 6; scales 14 between occipital and dorsal; 

 29-30 in lateral series; 8 in transverse series. 



Origin of dorsal slightly in advance of middle of the total length; 

 anterior to origin of anal in both sexes. 



General form elongate. Pectorals large and round, caudal subtrun- 

 cate. All fins usually without color. 



A series of from four to six continuous horizontal lines, formed by 

 contiguous marks on overlapi^ing scales. 



The largest specimen, a female in the I. U. M., is 69 mm. long. Of 

 the males, which range from 25-45 mm. in length seven ha\e the anal 

 tube of the male turned to the right and fifteen to the left. 



35. Fitzroyia eigenmanni Haseman. 



Fitzroya eigenmanni Haseman, Ann. Carnegie Museum, VH, 1911, p. 385, pi. 



LXXXn. 

 Jenynsia eigenmanni Regan, Ann. Mag. Nat. Hist., (8), XL 1913, p- 233. 



