198 CALIFORNIA ACADEMY OF SCIENCES. 



144, Brachyplatystoma reticulatum, 



Bagrus reticulala Kner, SB. Ak. Wien, xxvi, 1857, 376 (Salto Theo- 



touio, on the Araguay; Forte do Rio Branco; Eio Madeira). 

 Piratinga reticulata Bleeker, Nederl. Tijdschr. Dierkunde, i, 1863, 



99 (name only); Giiiither, Cat. Fish. Brit. Mus. v, 113, 1864 



(copied). 

 Brachyplatystoma reticulatum Eigenm. & Eigeiim. Proc. Cal. Acad. 



2d Ser. vol. i, 1888, 136 (name). 

 Habitat: Rio Tocantins, Amazon and its tributaries; Rio Madeira. 



This species is known only from the types; it is closely 

 related to, if not identical with, vaillanti. 



145, Brachyplatystoma rousseauxii, 



Bagrus rousseauxii Casteliian, Anim. Nouv. Rares de 1'Am. du 

 Sud, 32, plate 14, fig. 1, 1855 (Amazon). 



Brachyplatystoma rousseauxii Eigenm. & Eigenm. Proc. Cal. Acad. 

 2d Ser. vol. i, 1888, 136 (Para). 



Bagrus goliaft (Heckel MS.) Kner, SB. Ak. Wien, xxvi, 1857, 379 

 (Salto Theotonio). 



Piratinga goliath Gitnther, Cat. Fish. Brit. Mus. v, 113, 1864 (cop- 

 ied); Steindachner, Flussfische Siidamerika's, iii, 1, plate 3,, 

 1882 (Para). 



Habitat: Amazon and its tributaries. 



We are unable to distinguish rousseauxii from goliath. 



"Width below the dorsal spine about equal to or greater 

 than the depth. Snout very much produced, spatulate. 

 Width at angle of mouth 2 in head; greatest width of 

 head 1| in its length. Head entirely covered with skin 

 which is very porous and more or less reticulated. The 

 occipital crest triangular, concealed under the thick 

 skin, not reaching the dorsal plate, one-third of the dis- 

 tance to the dorsal spine. Fontanel long, elliptical, its 

 central point over the eye. 



Eye small, elongate, 7| in snout, 15-18 in head, 4-4 i 

 in interorbital ; snout about 2 in head. 



Maxillary barbels reaching little beyond base of pec- 

 toral; mental barbels very short, scarcely reaching be- 

 yond the vertical from the posterior margin of the orbit; 

 postmentals about to middle of pectoral. 



Jaws equal, or the upper a little longer, the teeth of 

 the outer two or three series of the intermaxillary band 



