161 



CHESTNUT-BELLIED DORAS. 



Doras castaneo-ventns. 



PLATE IIL 



Macusi, Karakiru ; Warrau, Mutu-mutu ; L, Geral, Keru- 

 keru ; in MSS., Anoya. Schoinb. Draicings, No. 42. 



The specimen is seven inches in length. In form 

 the head is rather depressed ; the eyes small, placed 

 considerably forward, protected anteriorly by a 

 process apparently of the superior maxillary bone, 

 which seems capable of motion, and is spined upon 

 its edges ; nostrils small, and placed near the mar- 

 gin of the lip ; the cirrhi reach to about the insertion 

 of the pectoral fins. The buckler is strong and gra- 

 nulated, nearly regularly rounded over its whole 

 surface, and having a small plahi oval depression 

 between the eyes. The number of entire costal 

 plates is twenty-eight, preceded by two imperfect 

 ones. These have the usual strong central spine, 

 but the spination upon the whole surface of each is 

 also strong, meeting on the back about mid way 

 between the first and second dorsal fins, and conti- 

 nued thence to the tail, upon the rays of which, for 

 half their length, it also prevails. The rays of the 

 dorsal and pectoral fins, in addition to being ser- 



