488 FISHES. ACANTHOPTERX-GII. 



Gen. 161. PREMNAS, Cuv. 



Head very obtuse ; teeth fine, short, in a single row ; strong 

 spines under the suborbitars ; preoperculi and suboperculi den- 

 tated ; lateral line terminating before reaching the tail. 



P. biacnleatus, Bloch. Body elongated ; the back blue j belly silvery, 

 with three distant, narrow, ferruginous bands ; two spines under 

 the eye. Inhabits Indian seas. Block, pi. 219, fig. 2. 



3. Two dorsal Jins, without the scaly thickening. 



Gen. 162. TEMNODON, Cuv. 



Body oblong and scaly, without spines or dentations on the head; 

 a row of compressed and pointed teeth in each jaw, behind 

 them a row of smaller ones, and five crowded teeth on the 

 vomer and palate ; second dorsal and anal fins scaly ; bran- 

 chial membrane with seven rays. 



T. heptacanthus. Seven spinous rays in the first dorsal fin ; tail 

 forked. Inhabits South seas. Lacep. iii. pi. 21, fig. 3. 



Gen. 163. EQUES, Bloch. 



Body elongated ; tail terminating in a point ; head blunt, and 

 the rays of the dorsal fin prolonged ; teeth small, crowded ; 

 swimming bladder large and strong. 



E. Americanus, Bloch. Head rounded and scaly ; back brown ; 

 sides and belly yellow, with three oblique black bands, the first 

 passing over the eyes, the second over the operculi and breast, and 

 the third commencing at the dorsal fin and running to the point 

 of the tail; first dorsal fin elevated, with prolonged separate rays. 

 12 inches long. Inhabits American seas. Shaw, iv. pi. 54. 



Gen. 164. POLYNEMUS, Lin. 



Snout gibbous ; head scaly ; preoperculi dentated ; teeth crowd- 

 ed ; vertical fins more or less scaly ; five rays under the pec- 

 toral fins, exceeding the length of the body in some species. 



P. paradiseus, Lin. Mango Fish. Body yellowish ; seven free rays 

 or long filaments on each side of the throat ; tail forked. 12 to 

 15 inches long. Indian and American seas. Shaw, v. pi. 118. 



P. quinquarius, Cuv. Body silvery, with five long thoracic filaments, 

 the three superior ones exceeding the length of the fish. Inha- 

 bits American seas. Shaw, v. 149. 



FAMILY VII. FISTULARID^E. 



This family is characterized by a long tube formed by the prolongation of the eth- 

 moid bone, the vomer, the preoperculi, the pterygoid and tympanal bones, at the 

 end of which the mouth is placed. Their intestinal canal has no great inequalities. 

 The body in some is cylindrical, and in others of an ovate and compressed form. 



Gen. 165. FISTULARIA, Lacep. 



Head much elongated ; jaws Very narrow, much produced and 

 tubular ; mouth terminal ; teeth small ; body much elongated 



