CH^TODONID^. EPHIPPUS. 213 



Ephippus. General structure and form of Cheetodon * ; 

 but the single or double dorsal fin has scales only at 

 the base of the rays^ and there are several short 

 spines in fronts placed close together. 



Platax Cuv, General form of Monodactylus ; but the 

 dorsal and anal are much more falcated^ and the 

 ventral fins often excessively long and pointed ; be- 

 fore the setaceous teeth is a row of others^ larger^ 

 and tricuspidate ; pectorals small ; caudal truncate. 



Gaimardi. Griff. Cuv. pi. 55. fig. 1. 



Ephippus Cuv. Teeth as in Chgetodon ; superior 

 profile much more arched than the inferior ; profile 

 obtuse ; front of the head gibbous ; dorsal fins two^ 

 the first naked ; pectorals small^ not larger than the 

 ventrals ; caudal truncate ; obsolete spines^ sometimes 

 pointing forward^ at the base of the first dorsal. 



gigas. Cuv. vii. 121. Spixii Sw. Spix pi. 61. -f- 



orbis. Griff. Cuv. pi. 42. 1. Goreensis. Cuv. pi. 178. 



Scatophagus Cuv. Dorsal fins two^ united at their 

 base, but "without any concealed pricikles in front, 

 almost naked, or devoid of scales ; pectoral fins small, 

 rounded ; ventral fins large, pointed ; caudal truncate. 



S. omatus. Cuv. pi. 180. 



Drepane Cuv. Pectoral fins excessively long and fal- 

 cate ; in other respects resembles Scatophagus ; but 

 the dorsal fins have more scales ; caudal truncate, 

 punctata. Cuv. pi. 179. 



Pimelepferus Lac. Body oval, more lengthened than 

 in any of the preceding divisions j head short, thick, 

 obtuse, the muzzle truncate ; forehead gibbous ; 

 mouth small, with a row of strong cutting teeth in 

 front ; dorsal fins two, united at their extremities, 

 with generally a procumbent spine in front ; anterior 



* Exceipting Pimelepferus, which leads to Toxctes. 

 t As this is totally different from the Gigas of Cuvier, I propose naming 

 it after its eminent discoverer. 



p 3 



