78. cetopsis. 199 



pressed, serrated along both" edges. The ventrals extend beyond the 

 origin of the anal ; caudal subtruncated. (Kner.) 

 Rio Guapore. 



78. CETOPSIS. 



Cetopsis, Af/ass. in Spix, Pise. Bras. p. 11. 



Cetopsis, Hemicetopsis, et Pseudocetopsis, Bleek. Nederl. Tydschr. 

 Dierh. 1863, p. 111. 



Dorsal fin short, without pungent spine ; no adipose tin ; the anal 

 terminates at some distance from the caudal, which is forked. The 

 upper jaw is the longer. Barbels six : one to each maxillary, and 

 two to each mandible. Vomerine and mandibulary teeth obtusely 

 conical, strong, in a single series ; palatine teeth none. Nostrils 

 remote from each other, of nearly equal width ; the posterior is quite 

 on the upper surface of the head, close to its fellow from the other 

 side. Head covered with thick skin. Eye rudimentary, more or less 

 hidden below the skin. Gill-opening very narrow. 



Brazil. 



1. Cetopsis csecutiens. 



Silurus ccecutiens, Lichtmst., Wiedem. Zool. Mag. 1819, i. pt. 3. p. 61. 



Cetopsis ccecutiens, Agass. 1. c. p. 12. tab. 10 fig. 2, and tab. A. fig. 5 



(anatomy); Kner, Sitzungsber. Acad. Wins. Wien, 1858, xxvi. p. 409. 



B. 8. D. 7. A. 22. P. 10. V. 6. 

 Intermaxillary with a band of villiform teeth. Barbels short. 

 The first dorsal and pectoral rays, in the male, are produced into very 

 long filaments. Uniform greyish. 



Brazil. 

 a. Fine specimen. River Cupai (branch of the Amazons, 800 miles 

 from the sea). Purchased of Mr. Stevens. 



2. Cetopsis candira. 



Agass. I. c. p. 13. pi. 10. fig. 1 ; Kner, Sitzungsber. Acad. Wiss. Wien, 

 1858, xxvi. p. 409. 



D. 7. A. 29. P. 9. V. 6. 

 Intermaxillary with a single series of teeth. Barbels short. Uni- 

 form greyish. 



Brazil. 

 a. Fine specimen. River Cupai. Purchased of Mr. Steveus. 



3. Cetopsis gobioides. 



Kner, Sitzungsber. Acad. Wiss. Wien, 1858, xxvi. p. 407. fig. 16. 



Intermaxillary with a band of villiform teeth. Ventral tins united. 

 The first dorsal and pectoral rays are produced into filaments in the 

 male. Greyish brown. 



Irisanga. 



