47. Cerithium. (Buccinwn Africanum, Lisler.) 



h. 



The head. 



it. 



tentacula. 



m. 



mouth. 



ee. 



.. eyes. 



T. 



.. trunk. 



I- 



..- foot. 



0. 



.. operculum. 



I 



48. Limax phosphorescens, 1-2. 



19. 20. Yetus, Adans. (Buccinwn Persicwn, Lister.) 



h. The head. 

 tt. . . tentacula. 

 m, .. mouth. 

 ee. .. eyes. 

 T. .. trunk. 



k. .. extremity of the mantle, forming a sort of pipe. 

 nn. .. membrane accompanying the mantle. 

 f. A part of its enormous foot. 



21. Haly otis. 



ft. The head. 



tt. .. four tentacula. . 



ee. .. eyes. 



n. .. membrane which attaches the lower tentacula to the head. 

 /. .. two anterior extremities of the mantle, coming out of the se- 

 cond hole of the shell. 



