ART. 4. NOTE OK ICICHTHYS LOCKINGTONI JORDAN. 3 



soft and limp. It is also evident that both are not far from Cen- 

 trolophus. In the genus Icosteus the bones are quite as weak 

 as in Icichthys^ but the naked skin is thick and firm and the 

 lateral line and the finrays are armed with prickles. We did not 

 find gullet teeth in Icosteus nor in Icticus^ but these fragile struc- 

 tures may have existed in either case. From the other " Kag-fishcs " 

 Icosteus differs widely in having but four soft rays in the ventral 

 fin. While Icticus has many points in common with Icichthys^ its 

 dorsal fin is divided into two, as in Nomeus, the first being well de- 

 veloped. All these forms are allies of the Stromateidae, but this 

 group seems too varied in form and structure to be placed in a 

 single family. For the present Icichthys may be left with the 

 Centrolophidae. The genus Ectenias Jordan and Thompson was 

 based on a yoimg Coryphaena. 



