erses the lower part of the orbit, are the most distinct among the 

 neurocranial bones. The gill covers are also satisfactorily preserved; the 

 structure of the lower border of the preoperculum is a specific index 

 character in recent species of genus Equula Cuvier. On the specimen 

 here considered, the lower border of the preoperculum has rather 

 strong spines, of which only three (Fig. 14) are preserved. Traces of scales 

 are detectable on the operculum, suboperculum and interoperculum. 

 Moreover, minute conical denticles are seen on the preserved fragment 

 of the premaxillary. 



The vertebral column unknown. 



cl. ---/- 



op. '-' 



;ubop. 



prma* 



y^ ... max. 



dent. 



intop. 



Fig. 14. Equula Cuv., skull (after specimen 196. Os.). ca. x 9.5. art. artic- 

 ulare, cl. cleithrum, dent, dentary, intop. interoperculum, max. maxillare, 

 op. opercelum, parsph. parasphenoideum, prop, praeoperculum, prmax. 

 praemaxillare, ptr. pterygoidum, Q quadratum, suhop. suboperculum, 

 sprcl. supracleithrum, sprocc. supraoccipitale. 



35; 



