ANODUS. 217 



silvery ; nostrils single, oval, placed on the snout. 

 Eyes near the middle of the head, iris black and 

 yellow; tongue fleshy; teeth, three rows in the 

 upper and one in the lower jaw ; jaAvs nearly equal. 

 Vent situate near the anal fin ; gill-opening semi- 

 lunar ; opercles smooth, with smooth edges. Lives 

 but a short time when taken from the water. Takes 

 bait, but is often killed by the arrow. Feeds on fruit, 

 insects, and small fish ; is esteemed for food. They 

 are rather scarce, only one specimen having been 

 killed during the expedition. 



D. 11— P. 15_.V. 8— A. 12_C. 20— Br. 4_Yert. 34, 



There is a good deal to observe correctly in the 

 internal structure of these fishes and allied species ; 

 they vary from each other in some having the air- 

 bladder single, others double, — and in some having 

 appendices to the stomach, others being without. 

 They are remarkable also as feeding on vegetables, 

 at least in part. The next elegantly formed fish we 

 have referred to 



ANODUS. 



" Anodus, Spix. — Caput mediocre, supra rotundatum, late- 

 raliier compressum. Oculi magni laterales. Os par- 

 vum, transversum. Denies nulli. Ossa inter-maxillaria 

 magna, totum labium superius sustinentia ; maxillarla 

 superiora minima, lateralia ; mandibula prominens. Lin- 

 gua apice libera. Membrana branehiostega radiis 5. 

 Corpus squamis minimis obtectum, elongatum, subteres, 

 lateraliter subcompressum. Pinnae mediocres." 



