SOUTH AMERICAN NEMATOGNATHI. 217 



Color ashy above with round spots, most numerous on 

 head, decreasing in number and increasing in size pos- 

 teriorly; middle of sides with a white band bordered 

 above and below with brown; these colors extending on 

 tail; lower parts white with scattered spots. Dorsal with 

 dark brown spots; adipose with larger spots. 



Head 3; depth 9; Br. 14 or 15; D.I, 6; A. 12 or 13. 



157, Sorubiniichthys spatula. 



Platystoma spatula Agassiz, Gen. Spec. Pise. Bras. 26, 1829 (Brazil); 

 Cuv. & Val. Hist. Nat. Poiss. xv, 17, 1840 (Brazil); Giinther, 

 Cat. Fish. Brit. Mus. v, 106, 1864 (copied). 



Sorubimichthys spatula Eigenm. & Eigenm. Proc. Cal. Acad.2d Ser. 

 i, 139, 1888 (name). 



Sorubim jandia Spix, Gen. Spec. Pise. Bras, plate xiv, 1829 (Equa- 

 torial Brazil). 



Habitat: ? Amazon. 



This species was based on a specimen about one metre 

 long, " more than 3 feet." It differs from 8. planiceps 

 chiefly in color. A second specimen has not yet been 

 found, and it is not unlikely that it is identical with 

 planiceps. 



158, Sorubimichthys gigas. 



Platystoma gigas Giinther, Ann. &Mag. Nat. Hist. 1872, x, 449 (Rio 



Huallaga). 

 Sorubimichthys gigas Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. 



i, 139, 1888 (name). 

 Habitat: Rio Huallaga. 



This species was based on a specimen two metres 

 long. We cannot detect any differences between this 

 species and planiceps that could not be accounted for by 

 age. As we have not been able to examine specimens 

 of such large proportions, we retain this as a distinct 

 species. 



XXXVIII. PLATYSTOMATICHTHYS. 



Platy#toin<t Kner, SB. Ak. Wien, xxvi, 1857,395, fig. 

 9 (sp). 



