30. piABucA. 343 



Salmo gastropelecus, L. Gm. i. p. 1384 ; Hloch, taf. 97. fig. 3 ; L'l. Schn. 

 p. 418. 



D. 10. A. 33-35. P. 11. V. 6. L. lat. 30-35. 

 A blackish ))and on each side of the tail. 

 Surinam ; Brazil. 



a. Skin : type of the species. From Gronow's Collection. — This spe- 

 cimen is not well preserved, and therefore we are not certain 

 whether it is really identical with the species examined Ly 

 Valenciennes. It has only 28 anal rays, hut some of them may 

 have been lost during the original process of preservation. 



6. Fine specimen. Esseqiiibo. From Mr. Ehrhardt's Collection. 



2. Gastropelecus stellatus. 



? Gastropelecus secm-is, Filtppi, in Guer. Rev. et Mag. Zool. 1853, p. 105. 

 Gastropelecus stellatus, Kner, Denkschr. Acad. Wiss. Wien, 18G0, xviii. 

 p. 17. taf. 1. fig. 2. 



D. 13-14. A. 38-40. L. lat. 20. 

 Uniform silvery, ■without baud aloug the side of the tail. {Kner.) 

 Itio Cujaba. 



3. Gastropelecus strigatus. 

 D. 9. A. 27. L. lat. 25. 



Thorax with four blackish bands radiating from the middle of its 

 convex edge ; a blackish band along the base of the anal fin. 



The characters given will be sufficient to distinguish this species 

 from its congeners, but the state of the specimens is such as to pre- 

 vent me from giving a more detailed description. 



Hub. ? 



a-b. One and a half inch long. Old Collection. 



30. PIABUCA. 



Piabuca, sp., Cuv. Mk/nc Aniin. 



Piabuca, 3Ii'dl. iS'- Trusch. Hor. Ichth. i. p. 9. 



Dorsal fin jjlaced rather behind the middle of the lenglli of the l)ody, 

 behind the ventrals ; anal long, commencing below the dorsal. Body 

 elongate, covered with scales of moderate or of snudl size. Belly 

 compressed. Cleft of the mouth narrow ; intermaxillary and num- 

 diblc ^vith a single series of fixed, flat, serrated incisors ; palate 

 toothless. GiU-mcmbranes iinited below the throat, not attached to 

 the isthmus. Intestinal tract with a single circumvolution. 



Brazils ; Surinam. 



1. Piabuca argentina. 



Piabuca, Marcgr. p. 170. 



Tnitta dentata, Kuel renter, Nor. Coinm. I'ctrop. 1 7(>1 , viii. p. 413. tab. 14. 



fig. 4. 

 Sahuo argcntinus, L. Syst. Nat. i. p. 511 ; Blvch, ial 382. fig. I ; Bl. 



Schn. p. 403. 



