10 



XIII. BALi:A. MOSS-SHELL. 

 An arbitrary name given by Dr. Leach. 



70. Balaa fragilis. Fragile Moss-shell. 



XIV. ACHATINA. AGATE-SHELL. 



So named from the Agate-like stripes which orna- 

 ment all the foreign species. 



71. Acliatina Aciciila. Needle Agate-shell, 



72. Acliatina octona. Taper Agate-shell. 



XV. SUCCINEA. AMBER-SHELL. 

 So called from the transparent amber colour. 



73. Succinea amphibia. Common Amher-shell. 



74. Succinea oblonga. Ohlong Amher-shell. 



XVI. CYCLOSTOMA. CIRCLE-SHELL. 



So named from the circular circumference of the 

 aperture or mouth. 



75. Cyclostoma elegans. Elegant Circle-shell. 



76. Cyclostoma productum. Produced Circle-shell. 



