eigenmann: pimelodella and typhlobagrus 253 



6747a-rf C. M., 13585 I. U. M., 7, largest 117 mm., Telembi above Barbacoas, 

 Jan. 13, 1913. Henn and Wilson. 



6748a-c C. M., 3, largest 125 mm., Telembi, above Barbacoas, Jan. 15, 1913. 

 Henn and Wilson. 



6750a-c C. M., 13587 I. U. M., Creeks above Barbacoas, Jan. 17, 1913. Henn 

 and Wilson. 



67Ma-i C. M., 13597 I. U. M., Patia, at mouth of Rio Guaitara. Henn. 



6749a-Z C. M., 13586 I. U. M.,21, largest 137 mm., Telembi, 8 miles above Bar- 

 bacoas, Jan. 16, 1913. Henn and Wilson. 



31. Pimelodella yuncencis Steindachner. 



Pimelodella yuncencis Steindachner, Denkschr. K. Akad. Wiss. Wien, LXXH, 



1912, p. 47 (Pacasmayo, Peru) ; Eigenmann, Reports Princeton Univ. Exped. 



Patagonia, HI, 1910, p. 389. 

 Rhamdia gilli Starks, Proc. U. S. Nat. Mus., XXX, 1906, p. 769, pi. LXV, fig. 1 



(Rio Eten, Peru); Eigenmann, 1. c, p. 389. 



Field Mus., 74 mm., April 2, 1912. Osgood. 



Habitat. — Northwestern Peru. 



The single specimen at my disposal has the following characters Head 4.33 ; 

 depth 5; D. 1.6; A. 12; eye 4.66 in the head, interorbital 3.66; pectoral spine nearly 

 equal to snout and eye, with 8 thorns on the basal two-thirds of its posterior mar- 

 gin; maxillary barbel reaching to last third of the ventrals; nearly uniform dusky, 

 without lateral band; fontanel a very narrow slit; occipital process not quite 

 reaching the dorsal plate. 



This species greatly resembles P. avanhandavce, which, however, has a broader 

 fontanel and the occipital process meeting the dorsal plate. 



32. Pimelodella chagresi (Steindachner). (Plate XXXIII, fig. 3). 



Pimelodus (Pseudorhamdia) chagresi Steindachner, Sb. Ak. Wien, LXXIV, 

 Ichthyol. Beitr., IV, 1876, p. 34 (Rio Chagres and its tributary, near Obispo). 



Pimelodella chagresi Eigenmann & Eigenmann, Proc. Cal. Acad. Sci. (2), I, 1888, 

 p. 134 (Obispo River); Occasional Papers Cal. Acad. Sci., I, 1890, p. 160 (Rio 

 Chagres and its tributaries); Eigenmann, Reports Princeton Univ. Exped. 

 Patagonia, III, 1910, p. 389. 

 Habitat. — Both slopes of Panama, Atrato, and Magdalena Basins. ? Rio 



Meta Basin. 



6753a C. M., 1, 145 mm., Tambo. Wilson. 



