72 Mr. 0. T. Hegan on the Analoniij and 



Family 1. Scombridae. 



Bofly fusiform ; spinous dorsal not longer tlian the soft ; 

 anal with 1 to 3 feeble sjiines ; ]>osterior rays of soft dorsal 

 and anal forming separate finlets ; each pelvic fin of a spine 

 and 5 branched rays; pelvic bones extending forward to the 

 cleithra. Vcrtebise 31toG6; anterior prajeaudals without 

 parapophyses, with sessile ribs ; posterior prajcaudals with 

 ribs attached at the extremities of closed htemal arches; 

 epipleurals on the centra. 



Scomber^ Thunnus, Acanthocyhium, Gaslirc/iisma, &c., 

 allied genera commence in the Lower Eocene. 



Division III. Luvariformes. 



Ilypural nearly or quite hidden by the bases of the caudal 

 fin-rays. Maxillaries broad and th-n, attaciied to the feeljle 

 prsemaxillaries, which are not produced into a beak and have 

 i-hort ascending processes for attachment to the ethmoid. 

 Lloutli small, anterior ; t.eth very feeble. Epiotics much 

 enlarged and meeting behind the supraoecipital, which is 

 carried forward to above the ethmoid. Gdl-membrancs 

 broadly joined to the isthmus. Pectoral fins placed raiher 

 low. 



Family 1. Luvaridae. 



23 vertebrae ; ribs sessile. Post-temporal fused with the 

 supra-cleithrum. Pelvic bones united. Dorsal and anal rays 

 flexible^ nou-articulaed. 



Luvarus hnperalis, a large pelagic fish resembling a Tunny, 

 is the only known species. 



Division IV. Xiphiiformes. 



Hypural nearly or quite hidden by the bases of the caudal 

 fin-rays'^. Along pointed rostrum, formed by the united 

 prjemaxillaries and by the nasals, the latter meeting in front 

 of the ethmoid and then diverging and tapering ibrward. 

 Mouth with lateral cleft; teeth small or absent. Epiotics 

 separated by the supraoccipital. Gill-memb:anes free from 

 the isthmus. Pectoral fins placed low. 



* Owing to the courtesy of Dr. Smith Woodward 1 have been able 

 to verify this character in I'altBorhyiichus and Blochiuf. 



