of the Islcmd of Trinidad, W. I. 25 



Mouth moderate with the gape oval. Lower jaw longer 

 than the upper. The interraaxillaries alone form the edge of 

 the upper jaw, and are very protractile ; their ascending 

 branches are longer than the horizontal, and when retracted, 

 reach to a line posterior to the centre of the orbits. 



Teeth on the intermaxillaries in an anterior row, moderate, 

 subcylindrical, and recurved near the summits ; behind these 

 are one or two irregular rows of smaller ones. Dentary with 

 similar teeth. Palatines, vomer, and tongue naked. 



Idps thin. 



Tongue rather thin, long. 



Lower pharyngeals forming an equilateral triangle, covered 

 with teeth, of which those near the posterior margin and along 

 the middle are largest, compressed, and with the summits 

 scarcely uncinate ; the lateral teeth are much smaller. 



Branchial arches with the concave sides provided with bony, 

 compressed, scabrous papillge. 



Branchiostegal rays five. 



Preoperculutn with the posterior margin serrated ; operculum 

 with an obtuse spine. 



Operculum, preoperculum, and the head above, as far as the 

 eyes, covered with scales similar to those of the body. 



Nares simple, near the mouth. 



Lateral line interrupted ; both portions rectilinear. 



Dorsal commencing above the base of the ventrals, and 

 extending along the entire length of the back ; the spinous 

 portion is long, low, and subequal, the soft portion hardly half 

 the length of the spinous, but much higher, especially the 

 middle rays, which are considerably produced beyond the 

 membrane. 



Anal commencing under soft portion of dorsal, and terminat- 

 ing at the same distance, supported by three spinous rays. 

 Soft portion with the median and posterior rays produced. 



The bases of both these fins are destitute of scales. 



Caudal with the base covered by scales ; the margin rounded. 



