84 MEMOIRS OF THK CARNEGIE MUSEUM. 



ulary teeth much expanded at the tip, with a small basal notch on each side and 

 three median points of about the same size and extent. Maxillary with few teeth, 

 broad-tipped, the points nearly alike. Mouth moderate; third suborbital in con- 

 tact with the preoperclc below; frontal fontanel short; adipose fin well-developed; 

 origin of anal below end of dorsal; caudal naked; lateral line complete; scales with 

 very few radial striae; interhsemals of the caudal peduncle not projecting. 

 Minute fishes of southern and eastern Brazil and Paraguay. 



Key to the Species of Holesthes. 

 a. Dorsal with a large, oblique, black wedge extending from the upper part of the anterior ray toward the 

 middle of the sixth ray; male with the outer ventral and first developed dorsal ray fiUform. 



46. pequira (Steindachner). 



aa. Tip of dorsal faintly dusky; interhajmals of the caudal peduncle of the male much stronger than the inter- 



neurals; outer ventral ray and first dorsal rays not filiform 47. heterodon Eigemnann. 



46. Holesthes pequira (Steindachner). (Plate XV, fig. 1.) 

 ? Salmo pequira Natterer, MS. 

 Cheirodon pequira Steindachner, Anz. Ak. Wiss. Wien, 1882, p. 180 (Rio Guapore); 



Flussf. Slidam., Vol. IV, 1882, p. 38 (Cujaba); Eigenmann & Eigenmann, 



Proc. U. S. Nat. Mus., Vol. IV, 1891, p. 54; Ulrey, Ann. N. Y. Acad. Sci., 



Vol. VIII, 1895, p. 290; Boulenger, Boll. Mus. Univ. Torino, Vol. XII, 1897 



(Caiza; Mission de San Francisco). 

 Holoshesthes pequira Eigenmann, Smiths. Misc. Coll. Quarterly, Vol. XLV, 1903, 



p. 144; Reports Princeton Univ. Exp. Patagonia, Vol. Ill, 1910, p. 429. 

 Odontostilbe trementince Eigenmann and Kennedy, Proc. Acad. Nat. Sci. Phila., 



1903, p. 513 (Arroyo Trementina); Eigenmann, Ann. Carnegie Mus., Vol. IV, 



1907, p. 125 (Puerto Max) ; Reports Princeton Univ. Exped. Patagonia, Vol. 



Ill, 1910, p. 429. 



Range : Upper Madeira, Paraguay. 



In the original description of pequira Steindachner states that the entire 



Fig. 31. Hukdhes pequira (Natterer). a, maxillary; b, premaxillary. 



anterior edge of the maxillary is finelj- dentate and that the caudal spot is very 

 small. If Steindachner's statement is correct then trementince is a valid species 



