CORYPH^NIDiE. ASTRODERMIN^. 



^55 



4. SuBFAM. ASTRODERMINiE. 



Crown gibbous^ obtuse ; mouth and eyes very small ; 

 ventral fins nearly obsolete^ placed before the pectorals ; 

 rays of the dorsal and anal fins simple. 



AsTRODERMEs BonueUi. Body lengthened^ oval ; ven- 

 tral fins nearly obsolete^ the first ray serrated ; body 

 with scattered^ detached, starlike scales. 



A. coryphenoides Bon. Cuv. and Val. pi. 270. 



Centrolophus Lac. Body shorter ; dorsal fin com- 

 mencing even with the pectoral j ventral fin small ; 

 anal fin half as long as the dorsal ; vent central ; 

 lateral line prominent. 



C. pompylus. Cuv. and Val. 269, 



5. SuBFAM. ACANTHURIN^. 

 Body ovate or oblong; mouth very small. 



Acanthurus. Body oval ; sides of the tail armed with 

 one moveable spine. 



Acanthurus Forskahl. Body scaly ; the dorsal fin sub- 



divided_, anterior rays remote ; caudal fin truncate, 



A. triostegos. Cuv. x. 199. 



Teuthys Linn. Body with a coriacious or granulated 

 skin, often marked with vertical or longitudinal cari- 

 nated lines ; dorsal entire ; caudal slightly forked. 

 T. argenteus. Frey. Atlas, pi. 63. f. 3. 



CtenodonSw. (^Jig.'J'^.) Body scaly; dorsal fin undi- 

 vided ; the spines very slender ; caudal fin very 



