242 CLASSIFICATION OF FISHES, ETC. 



AuLOSTOMA Xac. Snout greatly prolonged; the mouth 

 small, and obliquely vertical; body sub-cylindrical, 

 covered with close-set scales ; dorsal and anal fins 

 close, but not united to the caudal ; back with a row 

 of dorsal spines ; vent and anal fin central ; caudal 

 and pectoral rounded ; teeth none. 



A. Chinensis. Bl. pi. 388. 



PoLYCANTHus Sw. Body very slender, Unear, pentan- 

 gular ; jaws lengthened ; mouth small, terminal, 

 obliquely vertical ; lateral Hne carinated ; dorsal and 

 anal fins central ; tail slender ; ventral fins repre- 

 sented by spines. 

 P. spinachia. Sw. Yarrell, i. 87. Bloch, pi. 53. fig. 1. 



Gasterosteus Linn. Body oblong-ovate ; anterior 

 dorsal, and ventral fins represented by acute spines ; 

 second dorsal and anal placed near the caudal ; sides 

 of the body armed with carinated or spined plates 

 along the lateral line. 

 G. trachurus. Yarrell, i. 76. semiarmatus. lb. i. 80. 



Leiurus Sw. Resembling the last, but the loricated 



plates are wanting, and the tail is smooth. 



aculeatus. Yarr. i. 81. brachycentrus. Yarr. i. 82. 



spinulosus. lb. i. S3. pungitius. lb. i. 85. 



2. SuBFAM. SPH^RINiE. 



Body linear ; jaws produced, broader than high; mouth 

 large ; teeth strong, those in front much lengthened ; 

 dorsal fins two, triangular, remote ; ventral fin under the 

 first dorsal. 



Sphvr^na Cuv. Body much lengthened ; jaws pro- 

 duced, equal, but the chin advanced and pointed as 

 in Trichiurus ; dorsal fins placed at equal distances 

 from the head and the caudal fin. 



S. Europea. 



ParalepisCmu. Habit of the last, but the two dorsal fins 

 and the ventral placed much nearer to the caudal than 

 to the pectoral fins ; lateral teeth unequal, distant. 

 P. corregono'ides. Cuv. and Val. 66. 



