158 CALIFORNIA ACADEMY OF SCIENCES. 



The maxillary barbels reach to the end of the adipose 

 fin. The adipose fin is contained 3f in the length; head 

 4 in the length; depth 5|. 



115, Pimelodella harttii. 



Pimelodus harttii Steindachner, SB. Ak. Wien, Ixxiv, 1876, Sitss- 

 wasserfische siidostl. Bras, iii, 53 (Bio Parahyba). 



Pimelodella harttii Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. 

 i, 133, 1888 (name). 



Habitat : Bio Parahyba. 



This species is known only from the types. 



116. Pimelodella buckleyi. 



?Pimelodus lateristriga Cope, Proc. Acad. Nat. Sci. Philad. 1872, 



270 (Ambyiacu Biver, near Pebas). 

 Pimelodus buckleyi Boulenger, Proc. Zool. Soc. Lond. March, 1887, 



275, pi. xx, fig. i (Canelos). 

 ? Pimelodella buckleyi Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. 



i, 133, 1888 (Bio Parahyba; Macacos). 

 Habitat: Bio Parahyba; Amazon. 



The specimens examined, five in number, measure from 

 .13-. 18 m. and are from the Rio Parahyba and from 

 Macacos. 



The type described by Boulenger differs from the 

 specimens in the collection in having the pectoral spine 

 "smooth on its inner edge;" in the longer postmental 

 barbels which extend " to the extremity of the pectorals." 

 and in the longer adipose fin which is "a little more 

 than one-third of the total length (without caudal)." 

 The specimens described below may represent a distinct 

 species. See also description in the key. 



Body robust, compressed posteriorly, head sub-conical, 

 its width If in its length; depth at the base of the occi- 

 pital process 1J; width at the angle of the mouth 2|--3 

 in head. Profile decurved, a transverse section of the 

 head convex, occipital process long and slender, its width 

 at the base 3 in its length. 



Maxillary barbel reaching beyond origin of the anal; 

 mental barbel not reaching to the base of the^pectoral, 

 postmentals about to the middle of the pectoral. 



