XIV. NEW AND RARE SPECIES OF SOUTH AMERICAN 

 SILURID.^ IN THE CARNEGIE MUSEUM.^ 



By Carl H. Eigenmann. 



(Plates XXXIX-XLI.) 



Genus Pimelodina Steindachner. 



I. Pimelodina flavipinnis Steindachner. 



72530, C. M., 210 mm., Manaos, Nov. 28, 1909. Haseman. 



Maxillary barbel reaching slightly beyond tip of the caudal; adipose 

 2.22 in the length; depth six times in the length; greatest width of the 

 head one and a half times in its length; eye one and two-third times 

 in the interorbital; distance of adipose from dorsal equals the diameter 

 of the eye; pectoral longer than the dorsal, which is equal to the head. 

 First pectoral ray very flexible entirely to its tip, each of its segments' 

 with a main body and a prolongation from its upper outer corner, 

 these prolongations of successive segments binding them together; fre- 

 quently a spinule on the posterior face of the segments. No spots. 



Cheirocerus^ gen. nov. 



Type, Cheirocerus eques Eigenmann. 



This genus is like Pimelodina in all respects, except the first pectoral 

 ray, which is developed as a pungent spine. 



2. Cheirocerus eques sp. nov. (Plate XXXIX). 



7254a-Z>, C. M., 68-117 mm-, the larger one the type, Villa Bella, 



Oct. 5, 1909. Haseman. 

 72550-c, C. M., 95-110 mm., San Antonio, Nov. 3, 1909. Haseman. 

 7256a, C. M., 55 mm., Rio Mamore, Sept. 19, 1909. Haseman. 



Head 4.75-5; depth 5-5.75; D. 7; A. 11. Eye three times in the 

 head in the smallest, four times in the largest specimen; interorbital 

 four times in the head in the largest specimen, in others sometimes 



1 Contribution from the Zoological Laboratory of Indiana University, No. 151. 



2 X^i-p'v — a hand; Kepacr, to =!a horn. 



398 



