CH^TODONID^. — SC^NIN^. 215 



but the base of these fins are thickly covered with small 



scales. 



C. erythrogaster. Cuv. pi. 166. 



Microcanthus Sw. Body intermediate in form between 

 Chsetodon and Gerres : dorsal fin slightly emarginate ; 

 the anterior or spinal half naked, but with a scaly sheath 

 at the base ; anal spinal rays very strong, naked ; head 

 very small, pointed; teeth as in Chsetodon ; preoper- 

 cule serrated ; caudal lunate ; pectoral and ventral fins 

 equal. 



G. strigatus. Cuv. pi. 170. 



Mena^ Cuv. (^^.50.) Body fusiform,resembling a Spams, 

 and without any scales on the ^^ 



fins ; mouth very protractile ; 

 teeth of the vomer very small, 

 short, and crowded, placed on 

 a narrow longitudinal band; 

 those of the jaws extremely fine 

 and also in a band; between the ventrals and on their 

 sides are elongated scales. 



vomirina. Cuv. pi. 164, M. vulgaris. Cuv. 



Smaris Cuv. Differs only from Mena in having no 



teeth in the vomer. 

 S. chryselis, Cuv. pi. 165. alcedo, GrifF. Cuv. pi. 49. fig. 1. 



2. SUBFAM. SC^NIN^. 



Fins partially scaled at their base ; operculum armed 

 with spines ; the preoperculum serrated ; teeth strong, 

 but none either on the vomer or on the palate ; snout 

 more or less obtuse. 



Glyphisodon Cuv. General form of Chsetodon, but the 

 teeth are strong, cutting, emarginate or notched in the 

 middle, and placed in a single row; giUs quite smooth; 



* I have, for the present, followed MM. Cuvier and Valenciennes in 

 placing this and the following genera near to that of Gerres j but from the 

 general want of scales on the fins, and other considerations, I have some 

 suspicion that their natural situation will be among the true Span', which 

 Gerres obviously represents. 



p 4 



