248 



CHAPTEE XXXIX. 



OVAL SNAILS : BULIMUS. — PUPA. — BALEA. — CLAUSILIA, ITS SPRING DOOR. 

 ZUA, AZFXA. — ACHATINA. — AMPHIBIOUS SUCCINEA. 



HELICIDiE, OR SNAILS (continued). 



BuLiMUS. — The snails which are reckoned under this denomi- 

 nation resemble the Helices in every respect, excepting that 

 their shells, instead of being rounded or orbicular, with 

 short spire, have their spires produced, and consequently a 

 long or oval form. Large and splendid as are some of the 

 foreign shells of the genus, our English Bulimi are but 

 three in number, and small in size. The shell of B. acutus 

 is decidedly the prettiest ; it is pyramidal, witli very neatly- 

 arranged dark markings. That of B. Lachlianensis is plain 

 brown, rather tapering towards the apex, which is blunt. 

 These two are about three-quarters of an inch in length, 

 while B. ohscimis, resembling the latter, is only half the size, 

 with the mouth the smaller in proportion. 



