103 SILURID.E. 



is much stronger, serrated interiorly, two-fifths of the length of the 

 head. Brownish above, with numerous ovate black spots, as large 

 as, or larger than, the eyes ; sides with silvery patches ; dorsal and 

 caudal fins with black dots. 

 Southern Brazil. 



a. Skin, 3 feet long. From a Collection made by Ch. Cumberland, 

 Esq., on the river Cipo, a tributary of the Rio dos Vilhas which 

 falls into the San Francisco. Minas Geraes. 



7. Platystoma coruscaiis. 

 Marcgr. Hint. Bras. Pise. p. 174 (lower figure), copied by Wilkighby, 



tab. H. 7. fig. 2. 

 Sorubim caparari, Spix, Pise. Bras. pi. 13. 

 Platystoma coruscans, Agass., in Spix, Pise. Bras. p. 26. 



D. 1/6. A. 10. P. 1/10. 



The upper jaw projects but little beyond the lower. The maxil- 

 lary barbels extend on to the ventrals. Yellowish above, with 

 numerous blackish ocelli, as large as, or smaller than, the eye ; head 

 immaculate ; dorsal and caudal fins with black dots. {Ag.) 



River San Francisco. 



8. Platystoma pardale. 



Valene. incTOrbiq. Voy. Amer. Merid.Poiss. pi. 4. tig. 2 ; Cuv. ty Vol. xv. 

 p. 15. 



B. 16-17. D. 1/6. A. 13-14. P. 1/9. 



The upper jaw projects but little beyond the lower. Teeth as in 

 PI. tigr'mum. The maxillary barbels extend to the prasoperculum, 

 the outer of the mandible a little further backwards. Brownish ; 

 body and fins covered with numerous very small black spots. ( Vol.) 



Buenos Ayres. 



9. Platystoma truncatum. 



Agass., in Spix, Pise. Bras. p. 27. tab. 13 a ; Hyrtl, Denkschr. Acad. 

 Wiss. Wien, 1859, xvi. p. 17. 



D. 1/6. A. 10. P. 1/10. Vert. 13/33 (ffgrtl). 



The upper jaw projects but little beyond the lower. The maxil- 

 lary barbel extends to the middle of the pectoral, the outer ones of 

 the mandible nearly to the gill-opening. Dorsal spine serrated 

 behind. Adipose fin very low. Uniform yellowish ; dorsal and cau- 

 dal fins with black dots. (Ag.) 



Rivers Japura and Solimoens. 



10. Platystoma vaiUantii. 



Cur. S, Vat. xv. p. 21. pi. 423 ; Kner, Sitzungsber. Wicn. Acad. xxvi. 

 p. 397. 



B. 11. D. 1/6. A. 13. P. 1/10. Vert. 14/28. 

 The upper jaw pi'ojects but little beyond the lower. The maxil- 



