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 Zodlogy. 
22. Pimelodella macturki Higenmann. 
Pimelodella macturki E1GENMANN, Repts. Princeton Univ. Exp. Patagonia, ITI, 
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 eigenmanni Boulenger. 
Pimelodella buckleyi E1GENMANN & EIGENMANN (non Boulenger), Occas. Papers 
Cal. Acad. Sci., I, 1890, p. 158 (Rio Parahyba; Macacos). 
Pimelodella eigenmanni BoULENGER, Proc. Zoél. Soe. London, 1891, p. 232 (based 
on P. buckleyi of Kigenmann & Eigenmann); ErGeNMANN, Reports Princeton 
Univ. Exped. Patagonia, III, 1910, p. 389. 
Rhamdia eigenmanniorum Riperro, Fauna Bras., Peixes, [V, 1912, p. 218. Based 
on Kigenmann & Eigenmann l. c. 
Habitat.—Kastern Brazil. 
Head 4.5-5; depth 5.5-6.5; D. 1.6; A. 12-14 in the head, eye 3.54 in the 
head, in middle of the head; interorbital 1.33 in the eye, 5.8—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 1.83 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, LX XIV, 1876, Siisswassf. 
Siidéstl. Bras., II], p. 53 (Rio Parahyba). 
