236 REPORT OF NEW JERSEY STATE MUSEUM. 



711. Anal spines I or II, very rarely obsolete. percidje 



mm. Anal spines III or more, never II or I. 



n. Vomer and palatines usually with teeth. 



o. Anal shorter than dorsal ; head not covered every- 

 where with rough scales. serraxid.i; 

 00. Anal scarcely shorter than dorsal and similar ; 

 head and body everywhere covered with rough 



scales, PRIACANTHID,^ 



nn. Vomer without teeth, body deep, compressed. 



LOBOTID^ 



kk. Maxillary slipping for most its length under edge of preorbital, 

 which forms a more or less distinct sheath; accessory ventral 

 scale present ; opercle without spines. 

 p. Anal spines III. 



q. Mouth moderately protractile. 



r. Vomer with teeth. lutianid.^ 



rr. Vomer without teeth. 



s. Lateral teeth not molar. 



H^MULID^ 



.?J. Lateral teeth molar. sparid^ 



qq. Mouth exceedingly protractile. gerrid.^ 

 pp. Anal spines II, I or absent. 



f. Premaxillaries without blunt 

 posterior canine. 

 u. A pair of long mandibular 

 barbels. mullid.e 



nu. No mandibular barbels. 



SCL^NID^ 



tt. Premaxillaries usually with a 

 blunt posterior canine. 



LATILID.^ 



Family SCOMBRID^. 



The ^Mackerels. 



Body elongate, fusiform, not much compressed. Caudal 

 peduncle extremely slender, keeled. Head subconic, pointed an- 

 teriorly. Mouth rather large, with lateral cleft. Premaxillary 

 not protractile. Maxillary without supplemental bone. Jaws 

 with sharp teeth, large or small. Vomer and palatines toothed or 

 not. Preopercle entire. Opercle unarmed. In very young pre- 

 opercle armed with radiating spines, which are later absorbed and 

 lost. Gill-openings very wide, membranes not united, free from 

 isthmus. Gills 4, a slit behind fourth. Gill-rakers usually long. 



