T. LATUS. 241 



nini, at the cataracts of the Paramu, a tributary of 

 the Orinoco which joins that river above Esmeralda ; 

 it was of almost a black colour, and the size of the 

 common pacu. Although we saw them in numbers 

 feeding on tlie herbs at the rocks, we did not suc- 

 ceed in securing more than one, which the Indians 

 had cut up before I could inspect it." 



D. 22_P. 15— Y. 9— A. 43_C. 26_Br. 4— Yert. 36. 



TETRAGONOPTERUS. 



" Tetragoxopterus, Cuv Caput minimum, lateraliter 



compressum, Oculi maximi, laterales. Os sat magnum, 

 apertum quadratum ; mandibula prominens. Denies 

 magni cuspidati, apice serrati in mandibulse parte an- 

 teriore, et in duabus seriebus in latis osslbus inter- 

 maxillaribus totum marginem superiorem oris confor- 

 raantibus ; ossa maxillaria superiora parva retrorsum 

 subareuata, lateralia, dentibus minutissimus, ut in parte 

 posteriore ramarum mandibulse, armata. Lingua apice 

 libera. JSIembrana branchiostega radiis 4 latis. Corpus 

 squamis magnis tectum, compressissimum, latissimum. 

 Pinnae mediocres, analis latissima." 



Two di-awings appear to range in the above 

 group, and neither of them do we find any where 

 described, particularly the beautifully marked spe- 

 cies which we have dedicated to our traveller. 



T. LATUS, Broad SHAPED Tetjragonopterus. — 

 Arawaak, Cartaback ; L. Geral, Pacu.* Schomh. 

 Drawings^ No. 29. — This fish is nearly as broad as 



* The name Pacu, in the L. Geral, is common to the form. 



SCHOMB. 



