248 MEMOIRS OF THE CARNEGIE MUSEUM 



the basal half or six-tenths of its posterior margin; sharp hooks along the distal 

 portion of its anterior face; pectoral not nearly reaching ventrals, which are inserted 

 below the end of the dorsal; ventrals not nearly reaching anal the tip of which does 

 not extend to the end of the adipose; humeral spine reaching middle of pectoral spine; 

 upper caudal lobe much longer; a distinct band from snout to caudal; base of dorsal 

 hyaline. 



6974m differs in having the dorsal 1.7; the adipose very short, 6 in the length, 

 but extending beyond the tip of the anal; caudal lobes nearly equal in length, the 

 upper 3.75 in the length. Eye larger than in specimens of P. vittata in the Museum 

 of Comparative Zoology. 



22. Pimelodella macturki Eigenmann. 



Pimelodella macturki Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 

 1910, p. 389; Mem. Carnegie Mus., Vol. V, 1912, p. 170, plate XVI, fig. 1 

 (Creek in Mora Passage, trenches at Morowhanna, and Georgetown). 

 Habitat. — British Guiana near the coast. 



23. Pimelodella eigenmann! Boulenger. 



Pimelodella buckleyi Eigenmann & Eigenmann {non Boulenger), Occas. Papers 



Cal. Acad. Sci., I, 1890, p. 158 (Rio Parahyba; Macacos). 

 Pimelodella eigenmanni Boulenger, Proc. Zool. Soc. London, 1891, p. 232 (based 



on P. buckleyi of Eigenmann & Eigenmann) ; Eigenmann, Reports Princeton 



Univ. Exped. Patagonia, III, 1910, p. 389. 

 Rhamdia eigenmanniorum Ribeiro, Fauna Bras., Peixes, IV, 1912, p. 213. Based 



on Eigenmann & Eigenmann I. c. 



Habitat. — Eastern Brazil. 



Head 4.5-5; depth 5.5-6.5; D. 1.6; A. 12-14 in the head, eye 3.5-4 in the 

 head, in middle of the head; interorbital 1.33 in the eye, 5.3-6 in the head; maxillary 

 barbel extending to the origin of the anal; postmentals to middle of pectoral; 

 dorsal spine equidistant from snout and anal, its height 1.33 in the head; adipose 

 3.4-4 in the length, its distance from the dorsal equals the base of the latter. Cau- 

 dal lobes of equal width, the upper longer, 4 in the length. Anal rounded; pectoral 

 spine a little less than the length of the head, with teeth which are not more than 

 one-fifth or one-sixth the width of the spine. A dark lateral band. 



24. Pimelodella hartti Steindachner. 



Pimelodus hartti Steindachner, Sb. Akad. Wiss. Wien, LXXIV, 1876, Siisswassf. 

 Siidostl. Bras., Ill, p. 53 (Rio Parahyba). 



