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. Fimelodella harttii. 



Pimelodus harttii Steindachuer, SB. Ak. Wieu, Ixxiv, 1876, Siiss- 

 wasserfische sudostl. Bras, iii, 53 (Rio Parahyba). 



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

 i, 133, 1888 (name). 



Habitat : Eio Parahj'ba. 



This species is known only from the types. 



116. Fimelodella buckleyi. 



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



270 (Ambyiacn Eiver, 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 (Rio Parahyba; Macacos). 

 Habitat: Eio 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 1| in its length; depth at the base of the occi- 

 pital process li; 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. 



