248 



THE AMERICAN CHARACIDAE. 



14. ASTYANAX (POECILURICHTHYS) ABRAMIS (Jeuyns). 



Plate 42, fig. 2. 



Tetragonopierus abramis Jenyns, Zool. Beagle. Fishes, 1842, p. 123, pi. 23, fig. 1 (Rio Paraiid); 



GuNTHER,.Ann. mag. nat. hist., 1880, ser. 5, 6, p. 12 (La Plata); EiGENMiUvrN & Eigenmann, Proc. 



U. S. N. M., 1891, 14, p. 52; Ulrey, Ann. N. Y. acad. sci., 1895, 8, p. 274; Botoenger, Trans. 



Zool. soc. Lend., 1896, 14, p. 35 (Descalvados) ; Perugia, Ann. Mus. civ. stor. nat. Geneva, 



1891, ser. 2a, 10, p. 25 (Rio Madidi); Eigenmann & Kennedy, Proc. Acad. nat. sci. Phil., 1903, 



p. 521 (Asuncion; Arroyo Tremeutina). 

 Astyanai abramis Fowler, Proc. Acad. nat. sci. Phil., 1906, p. 439 (Peruvian Amazon); Eigen.mann & 



Ogle, Proc. U. S. N. M., 1907, 33, p. 28 (Paraguay); Eigenmann, Rept. Princeton univ. exped. 



Patagonia, 1910, 3, p. 432. 

 Telragonoplertis orbignianus Cuvieb & Valenciennes, Hist. nat. poissons, 1848, 22, p. 147, in part 

 (Buenos Aires) . 



Specimens examined. 



Locality 

 Tabatinga, Amazon 



Asuncion, Paraguay 

 Arroyo Trementina, Paraguay 

 Rio Coxipo, Matto Grosso 

 Quebrada Cramalote, Villaviceneio 

 Barrigon, Rio Meta 



Collector 



Bourget 



Anisits 



Anisits 



Anisits 



Gonzales 



Gonzales 



One of the types of Tetragonopierus orbignianus Cuv. & Val. belongs to 

 this variety. 



This species is a modification of A. bimaculatus, from which it differs in the. 

 number of scales. 



The following description is based on the specimens from the Amazon and 

 the Paraguay. 



Head 3.7 (4.2^.4 in the specimens from Colombia), depth 2.5; D. 11: 

 A. 30-34^ scales 7 to 10-38 to 49-6 or 7^; eye 3 in head; interorbital 2.7. 



Silvery band well developed, a well-marked caudal spot, abruptly narrowed 



' To base of caudal. 



' 41 mm. to base of caudal. 



' Of 30 examined five have 30 rays, five 31, eleven 32, five 33 and four 34. Of the specimens from 

 Colombia one has 28, four 29 and three 30. 



* Seven specimens from Tabatinga have 7-38-6; 7-39-6; 8-38-6; 7-41-6; 8-45-7; 7-48-6; 

 9-49-7; the three Paraguay Basin specimens have 10-46-7; 9-44-7; and 9^5-7. The specimens from 

 Colombia have 9 or 10 — V", V". ", ¥, V, — 7 to 9. 



