CYPE^A.— Plate III. 



The tortoise-shell Cowky. Shell elongately ovate, 

 somewhat cvKiiclrieal, thick, inclining steeply down 

 each side towards the extremity, aperture narrow, 

 ■ teeth rather small, numerous ; milkj' brown, back 

 clouded and spotted with fulvous and chesnut brown, 

 and profusely sprinkled with minute white scurf-like 

 dots, base llesh-tinged brown. 



Testa junior. 



Teda junior lacleo-fusca uniusnwdi obsctm fasciata, fasciis 

 circa coluniellam inMcuUs castaueis irregidurilus inter- 

 ruptis. 



Young shell uiiifonn pale mdky brown, obsciu-ely banded, 

 bands inteiTupted about the columella with irregu- 

 lar chesnut blotches. 



LiNN-EUS, Syst. Nat. (12th edit.) p. 1173. 

 Hab. Mauritius. 



This is certainly a most characteristic species, imlike 

 any other of the genus both in form and colouring, wliich 

 latter, as its name implies, is of a rich tortoise-shell pat- 

 tern. The chief pecidiarity of the shell consists in its be- 

 ing sprinkled with a fine scurf of promiscuous white specks, 

 which may be observed to be imbedded at difl'erent depths 

 in the enamel ; and it is only in the last coating of enamel 

 that this scurf occurs. 



In the young shell there are several bands of interrupted 

 chesnut-brown blotches, very irregular in size, and more or 

 less obscure in appearance ; they begin to change as the 

 second stage of gi'owth is proceeding, and entirely dis- 

 appears dming the progi'ess of the third. 



