FOSSIL AND RECENT 



59 



pel 2 



cor 



Fig. 27. Tarpon atlanticus (Cuvier & Valenciennes). 



side in medial view. 



Pectoral girdle of right 



The lateral line canal descends from the underside of the supratemporal and runs 

 within a bony tube on the outer surface of the post-temporal before leaving the bone 

 to pass into the supracleithrum. Posteriorly the post-temporal has a small promi- 

 nence which fits into a depression at the dorsal end of the supracleithrum. 



The blade-shaped supracleithrum is pierced dorsally by the lateral line canal which 

 runs obliquely across its lateral face. Numerous ventral branches are given off 

 from the supracleithral canal. 



