ZEIDM. CENTRONOTTN^. 245 



Centronotus Lac. Body oblong or oval ; mouth 

 moderate or small ; the jaws equal, and not opening 

 behind the eye ; dorsal fin one, preceded by small 

 detached spines ; lateral hne curved and smooth ; 

 jaws retractile ; anal fin small, but always present. 



Trachinotus Lac. Body oblong-oval, much compressed, 

 and rather broad ; snout short, thick, obtuse, some- 

 times nearly vertical ; eyes placed low down, and 

 remote from the crown; mouth small; dorsal and 

 anal fins falcate, the latter shortest ; dorsal spines 

 small, remote, sometimes pointing forwards ; caudal 

 without ridges at the base. 



T. pampanus. Cuv. pi. 237. 



Centronotus Lac. Body oblong-fusiform ; snout not 

 obtuse ; head narrowed ; dorsal and anal fins of equal 

 length, and falcated ; mouth small ; jaws equal ; a 

 prickle pointing forward on the back ; tail not cari- 

 nated ; caudal large, forked ; scales minute. 



quadripunctatus Sw. Riipp. i. 24. glaycos Sw. Cuv. pi. 234. 



Lichia Cuv. General shape of Centronotus, but the anal 

 fin, as in Trachinotus, is shorter than the dorsal; mouth 

 large, opening beyond the eyes, which are low down ; 

 lower jaw longest ; tail not carinated. 

 L. vandigo. Cuv. pi. 235. 



Naucrates Raf, Body thick, oblong, ovate; ventral 



fins as large as the pectoral ; anal shorter than the 



dorsal; mouth small; jaws equal; tail with a fleshy 



carinated ridge ; dorsal and anal spines minute. 



ductor. Sw. App. serratus. App. 



cyanophrys. App.. niger. Bl. pi. 3. 



Scorpis* Cuv. Resembling in shape a Chaetodon ; the 

 dorsal spines being connected and graduated so as to 

 join the dorsal fin; anal spines the same; and 

 both fins with the caudal partly covered with minute 

 scales ; teeth strong, acuminate ; dorsal and anal fins 



* This singular fish seems to me a Centronotus in the disguise of a Chce- 

 todon, just as is Enoplosus among the perches. 



R S 



