GASTEROPODA. 



65 



aperture pear-shaped, converging into the wide canal ; the 

 outer lip thin, simple, angular at the upper part, and 

 tuberculated. Animal, with a prolonged conical snout- 

 like head, with a proboscis, which can be protruded con- 

 siderably ; tentacula small, and placed on the side of the 

 mouth ; eyes small, situated on the outer base of the ten- 

 tacula ; foot oval, blunt before ; no operculum. 



Philippi remarks, that to this genus only belongs Py- 

 rula tuba of Lamark, and probably P. ternatana, and one 

 or two other similarly shaped species. 



Pyrula. Lam. (Cassidulus Gray). — Shell pear- 

 shaped ; spire short ; mouth oval ; 

 left lip smooth ; canal straight, some- 

 times narrow at the extremity ; um- 

 bilicated or not. Animal, with a nar- 

 row head, very much elongated, 

 having two small tentacula at the 

 end, at the base of which externally 

 are the eyes; the foot moderately 

 large ; a horny oval operculum, 

 pointed at the low er end. — 2 9 species* ; 

 also fossil. 



Many species of this genus are brought from the Indian 

 Ocean and Red Sea. The Pyrula canaliculata is found 

 in the Northern Ocean ; it is a large but light shell, six 



I inches in length. The Pyrula rapa has the spire quite 

 flat, and if placed upon that part will stand upright ; it 



f is very rare. In the British Museum is a specimen of a 

 Pyrula Bezoar that appears to have grown with perfect 

 regularity until the formation of its last half whorl, which 

 is thrown considerably more than half an inch out of its 



* Reeve's Iconica. 

 F 



