252 MEMOIRS OF THE CARNEGIE MUSEUM 



aa. Upper caudal lobe much longer than the lower, much longer than head. 



c. Distal one-third or one-fourth of pectoral spine without hooks, the hooks strong. 



d. Adipose fin 3-3.5 in the length; pectoral spine equal to length of snout and ej'e; maxillary 

 barbels reaching beyond the base of anal. Head 4.5-4.8; depth 5-6; D. 1.6; A. 11-12. 



32. chagresi (Steindachner). 

 dd. Adipose fin 2.66-2.75 in the length, pectoral spine a little longer than snout and eye, maxil- 

 lary barbel reaching beyond origin of anal. Head 4.75; depth 5.5; D. 1.6; A. 11. 



33. dongala (Giinther). 

 cc. Distal half of inner face of pectoral spine without hooks; adipose fin 3.2.5-3.5 in the length; 

 pectoral spine equal to head less half or whole of operele; maxillary barbels reaching beyond 

 tip of ventrals in the small or anal in the large; head 4-4.66; depth 5.5; D. I, 6; A. 11-12. 



34. eutcenia Regan. 



29. Pimelodella grisea Regan. (Plate XXXIII, fig. 2). 



Pimelodella griscus Regan, Ann. and Mag. Nat. Hist., Ser. 7, Vol. XII, 1903, 

 p. 625 (Northwestern Ecuador) ; Eigenmann, Reports Princeton Univ. Exped. 

 Patagonia, III, 1910, p. 389; Regan, Ann. and Mag. Nat. Hist., Ser. 8, Vol. 

 XII, 1913, p. 467 (Rio San Juan). 



6751a-i C. M., 13588, 1. U. M., 41, largest 165 mm., Rio Dagua at Cordova. Eigen- 

 mann. 



6752a C. M., 13589, I. U. M., 2, 152 and 155 mm., San Juan half-way between 

 Puerto Negria and Istmina. Eigenmann. 



13598 I. U. M., 1, 116 mm., Istmina. Eigenmann. 



Habitat. — San Juan River, Colombia, south to Northern Ecuador. 



30. Pimelodella modesta (Giinther). 



Pimelodus modestus Gunther, Proc. Zool. Soc. Lond., 1860, p. 239, pi. X, fig. C 



(Esmeraldas) ; Cat. Fishes Brit. Mus., V, 1864, p. 117 (Esmeraldas) ; Fish. 



Cent. Amer., 1866, p. 393 (Rio Chagres, Esmeraldas). 

 Pimelodella ynodestus Eigenmann & Eigenmann, Proc. Cal. Acad. Sci., (2), 



Vol. I, 1888, p. 133 (name); Occasional Papers Cal. Acad. Sci., I, 1890, p. 155 



(rivers of Western Ecuador); Eigenmann, Reports Princeton Univ. Exped. 



Patagonia, III, 1910, p. 389. 



Habitat. — Patia, River of southern Colombia to the Chone River in Ecuador. 

 6743a-e C. M., 13574 I. U. M., 42, largest 122 mm., Chone, Ecuador. Henn. 

 6744a-Z C. M., 13575 I. U. M., 19, largest 72 mm., Portovicio. Henn. 

 6745a-i C. M., 13583 I. U. M., 54, largest 140 mm., San Lorenzo, Rio Telembi, 



Jan. 14, 1913. Henn and Wilson. 

 6746a-i C. M., 13584 I. U. M., 57, .argest 135 mm., Patia, between Magui and 



Telembi. Henn. 



