104 CALIFORNIA ACADEMY OF SCIENCES. 



70. Pinirampus pirinampu. 



Phnelodus pirinampu Spix, Geu. et Spec. Pise. Bras. 20, pi. viii, 



1829 (Brazil); Schomburgk, Fishes Giaiana, part i, 18,3, 1841 



(Guiana); Casteluau, Auim. Amt'r. Sud, Poiss. 35, 1855 



(Amazon). 

 Pinirampus pirinampu Eigenm. & Eigeum. Proc. Cal. Acad. 2d Ser. 



vol. i, 1888, 121 (Cameta). 

 Pimelodus pirinampus Cuv. & Val. Hist. Nat. Poiss. xv, 196, 1840 



(Brazil); ? Kner, SB. Ak. Wien, xxvi, 1857, 416 (loc.?). 

 ? Pimelodus harhancho Humboldt, Kec. Obs. Zool. ii, 172, 18.3.3 



(Venezuela). 

 Pm«>am/)?<s <yp2<s Bleeker, Nederl. Tijdschr. Dierkuude, i, 100, 1863 



(name only). 

 Pirinampus typus Guntlier, Cat. Fish. Brit. Mus. v, 135, 1864 



(copied). 

 Habitat: Kio Tocautius to Venezuela. 



From Dr. Steindachner's statement that his Piniram- 

 pus agassizii differed from pirinampit Kner only in hav- 

 ing the postorbital portion of the head granulated, we 

 judge that the specimens mentioned by Kner, 1. c. (which 

 Steindachner had for comparison) were not the piri- 

 nampu Ag., for the specimen figured by Steindachner 

 as agassizii is wholly unlike and generically distinct 

 from specimens which agree in all respects with Agas- 

 siz's description of pirinampu. 



Two specimens .455 m. and .38 m. long, collected by 

 Professor Louis Agassiz at Cameta. 



Body elongate, compressed to a ridge above, the caudal 

 peduncle subcylindrical. Head depressed above the 

 eyes, and forward to the posterior nasal openings, the 

 profile rather steep from the occipital crest to the poste- 

 rior margin of the eyes, thence less inclined, again de- 

 curved from the posterior nostrils forward, the tip of the 

 snout convex, the upper jaw little longer than the lower; 

 the greatest width of the head (from opercle to opercle) 

 one-fifth greater than the depth at base of the occipital 

 process, and 1\ in its length; its width at the angle of 

 the mouth lf-l| in its length. Fontanel not continued 

 behind the eye, but a groove extends to the occij^ital 



