THEMISTO LONGISPINOSA. 383 



the base ; its edges are serrated, and its extremity bifur- 

 cated ; the bottom of the fourth being rounded, and the 

 extremities of the fork also blunted and rounded. The 

 internal caudal fins are truncated at their extremities ; the 

 external are paddle-shaped, and rounded at their extremi- 

 ties. Both of these fins are fringed at their extremities 

 and inferior edges with long hairs.' 1 '' 



