CEPHALOPODA—SEPIOIDEA. 233 



Order SEPIOIDEA. 



(Cuttle fish.) 



Sepiophorida. 



CLXXVII. Belosepia Voltz. 



Posterior portion of proostracum, or pen, ending in bent spine, 

 and thickened anteriorly, where it is laterally expanded ; a conical 

 alveolus marks the position of the phragmocone. Eocenic. 



410. B. ungula Gabb. (Fig. 15 16.) Eocenic. 



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P'lG. 15 16. Belosepia loigula, three views. (After Cossmann.) 



Conical expansion of proostracum (mucro), much thickened at 

 anterior end, which is strongly roughened ; alveolar cavity profound. 

 Claibornian sands of Alabama. 



