245 



XIFHOSTOMA. 



XiPHOSTOMA, Spix Caput longissimuin, acuminatum, 



tenue, subteres. Ociili minores, laterales. Os quam 

 maximum, longissimum, transversum, armatum denti- 

 bus minutissimis, confertissimis, acutis, in toto suo mar- 

 gins ; id est, in longissimis ossibus inter-maxillaribus, 

 que totum oris marginem superiorem conformant, nee 

 non in mandibula ; ossa maxillaria superiora minima, 

 perpendicularia ad commissuram maxillanmi. Liugua 

 magna, lata, apice libera. Membrana branchiostega 

 radiis 4 gracillibus. Corpus elongatmn, teres, squamis 

 mediocribus duris obductum. Pinnae ventrales parvae, 

 dorsalis pone ventrales, caudalis magna." 



OCELLATED XIPHOSTOMA. 



Xiphostoma ocellatum. 



PLATE XXIII. 



Arawaak, Pirapu ; Macusi, Morowai ; L. Geral, Pirapoco. 

 Scliomh. Dratvings, No. 7. 



Though very nearly allied to the figure given by 

 Spix as JT. Cuvierii, we have ventured to place it 

 distinct. The fonn of the tail, as particularly al- 

 luded to by our author, is more rounded, and there 

 is no appearance given in the drawing to the lined 



