eigenmann: the cheirodontin^. 



25 



h. Scales34;caudalspotnotcontmuedtotheendof the middle rays. .11. paraguayensis Eigenmann. 

 hh. Scales 30; caudal spot continued to the end of the middle rays. A. 23. 12. nattereri Steindaclmer. 

 gg. Dorsal with a black spot; no caudal spot. 



i. A black band along the tips of the shorter anal rays and across the middle of the elongate rays ; 



A. 27; scales 30 13. agassizi Steindaclmer. 



ii. A small, black spot near the tips of the first few anal rays; A. 22-23; scales 30. 



14. maxillaris Ulrey. 



4. Aphyocharax dentatus Eigenmann & Kennedy. (Plate IV, fig. 1.) 

 ? Aphyocharax {Chirodon) alburnus Perugia, Ann. Mus. Civ. Storia Nat. Genova, 



(2), Vol. XVIII, 1897, p. 25 (Rio Beni; Missioni Mosetenes). 

 Aphyocharax dentatus Eigenmann and Kennedy, Proc. Acad. Nat. Sci. Phila., 1903, 



p. 576. (Asuncion; Arroyo Trementina); Eigenmann, Ann. Carnegie Mus., 



Vol. IV, 1907, p. 126 (Corumba, Puerto Max; Rio Negro; Rio Pilcomayo); 



Reports Princeton Univ. Exped. Patagonia, Vol. Ill, 1910, p. 429. 



Range : Paraguay basin. 



10032, I. U. M.,type, 71 mm. and 10033, 10036, 10037, 10038, I. U. M., ten. 

 Asuncion. Anisits. 



10034 and 10035, I. U. M.; 932a & b, C. M. Aguadas near AxToyo Tremen- 

 tina. Anisits. 



10290 and 10187, I. U. M., nine. R. Paraguay, Corumba. Anisits. 



10190, I. U. M., one. Rio Paraguay, Puerto Max. Anisits. 



10230, I. U. M., ten. Tributary of the Rio Negro emptying into Rio 

 Pilcomayo. Anisits. 



6911a, C. M., one, 37 mm. Asuncion, Paraguay. Haseman. 



6912a-q, C. M., seventeen, 23-72 mm. R. Paraguay, Caceres, May 26, 1909. 

 Haseman. 



1913a-j, C. M., eleven, all females, largest 52 mm. Corumba, May 9, 1909. 

 Haseman. 



6914a-e, C. M., five (one male) 56-64 mm. Corumba, April 27, 1909. Hase- 

 man. 



7313a-j, C. M., ten, largest about 72 mm. Villa Hays, April 13, 1909. Hase- 

 man. 



?7314a-c, C. M., three, largest about 25 mm. Santa Rita, June 12, 1909. 



Haseman. 



Head 4-3.8; depth 3.6-3.75 (3.4-4 in extremes); D. 11; A. 18-22; scales 5.5 

 to 7-36 to 42-4.5 to 6; 7 to 14 scales with pores; eye 3.5-4 in the head, 1 in snout; 

 interorbital 3-3.33 in the head. 



