Fisher: Hypophthalmid.e, Diplomystid^, Silurid^. 407 



10. ^lurichthys bagre (Linnaeus). 



7i3iff-c, C. M., three, 210-380 mm., Para, Jan. 15, 1910. Haseman. 

 7013a, C. M., one, 380 mm., sea at Cachoeira, April 17, 1908. Hase- 

 man. 



Subfamily Callgphysin.^. 



II. Callophysua macropterus (Lichtenstein). 



6988a, C. M., one, 265 mm., San Joaquin, Bolivia, Sept. 5, 1909. 

 Haseman. 



yoi8a-b, C. M., two, 245-340 mm., Manaos, Nov. 28, 1909. Hase- 

 man. 



7019c, C. M., one, 340 mm., Cachoeira Theotonio, Rio Madeira, Oct. 

 30, 1909. Haseman. 



Subfamily Pimelodina'^. 



12. ?Pinirampus pirinampu (Spix). 



6040C-C, C. M., three, about 380 mm., Cachoeira Theotonio, Rio 

 Madeira, Oct. 30, 1909. Haseman. ■ 



13. Luciopimelodus agassizii (Steindachner). 



7251a, C. M., one, 139 mm., Para, Jan. 19, 1910. Haseman. 



This dififers from the type of Luciopimelodus in having a pungent 

 dorsal spine, but in our specimen there is evidence that the pungency 

 is due to the fact that the tip has been broken off and it is a question 

 whether the .same is not true of Steindachner's typical specimen. It 

 is nearly related to L. plaianns. 



Head 4.25; depth 4.75; D. 1.6; A. 15; eye 5.25; interorbital 4; snout 

 very little longer than postorbital portion of the head; maxillary 

 barbel reaching to very near caudal; postmental but very little short- 

 er; occipital process very narrow, not reaching to the dorsal plate; 

 a small oval fontanel at the base of the process; frontal fontanel large, 

 with a bridge separating the posterior fifth. Adipose 2.7 in the length. 



The fins are all pointed, the pectoral reaching the ventrals. First 

 pectoral ray as in Pimelodina jlavipinna. Caudal very deeply forked. 

 Barbels slaty black except at base; dorsal and pectoral slaty; distal 

 portion of ventral, anal, and margin of adipose similar. 



14. Luciopimelodus pati (Valenciennes). 

 7239a, C. I\I., one, 284 mm., Buenos Aires, March 11, 1909. Haseman. 



