scoMniUD.K. Ar).') 



One long dorsal fin, without distinct Hpinous di- 

 vision ; tooUi-like processes extend into the 

 oesophagus 1). Stromateina. 



One long dorsal fin, svithout distinct spinous di- 

 vision ; no teeth in the oRsophagus K. Coryphaenina, 



Synopsis of the Genern. 



First f/roup: Scombrina. ,Sromf>ri(lff with two dorsal fins, the 

 spinous portion l)eing s('])arate, and much less developed than tlx- 

 soft, liody oblong, without or with very small scales. 



Five or six fiiilots ; scales equally covering the whole body ; 



two sliglit ridges on each side of t ho tail 1 . Sco>f nEU 



Six to nine fiiilets ; scales of the pectoral region fornn'ng 

 a corslet ; a keel on each side of the tail ; teeth rather 

 small ; vomerine and palatine teeth 2 Tiiynni's 



Seven to nine finlets (six) ; scales of the pectoral rcigion 

 forniing a corslet ; a keel on each side of the tail ; 

 tectli of moderate strength ; palatine (eeth ."> Pef.am y> 



Seven to nine finlets ; scales of the pect<iral n.-gion forniing 

 a corslet; a keel on each side of tlie tail ; teeth von 

 small, none on the palate 1 Arxis 



Seven or more (rarely less) finlets ; body naked or with, 

 rudimentary scales ; a keel on eaeii side of the tail ; 

 teeth strong .">. Cvninv 



Finlets none ; the first dorsal reducwl to a few free spines ; 



a keel on eacli side of the tail .. (> Nauckatk,.'- 



Finlcts none ; the first dorsal reduced to some free spines ; 



ventrals thoracic ; caudal keel none 7, Elacatk. 



The spinous dorsal modified into a sucking organ, situated 



on the head 8. Kcjif.np^is. 



Ventrals jugular {•. Ifyr'SirTEitA. 



Second rjrovp : Nomeina. Scomhrida> with a distinct spinous por- 

 ti6n of the doi-sal fin, separated Irom, or continuous with the soft, 

 wdiich is the more dovfdoped. Body oblong, covered with cycloid 

 scales of moderat/; size. 



Ventrals very long ; tail with many fijilets ; niuutli wide. 10. CrASTEiiocni.s.MA 



Ventrals long ; mouth narrow 11. Nomkus. 



Two dorsals ; ))ectoral longer than the ventral ; teeth 



small; snout swollen 12. CuiiiCEi's. 



Two dorsals ; pectoral longer than the ventral ; teeth mi- 

 nute ; snout subconical 13. NEi*To.Mr.Nijs. 



Two dorsals ; )iectoral and ventral rather short ; teeth 



minute 14. Pf,ATv.sTr,Tiirs 



A single dorsal, witli the ]iosterior spines Innffcst 1."). DrTincMA 



2 \ 2 



