302 



T. with a very (Irong, fub-oval fliell: the firft volution 

 large, the others, which are four or five, are fmall anc> 

 nearly flat, feparated only by a fine line; aperture fub- 

 orbicular; outer lip thin; inner hp thick and ftrong. 

 Length frequently an inch. Full grown (hells are ufually 

 fmooth, of a uniform brown colour : younger ones are 

 often fafciated with broad, white, or purplifli-brown bands, 

 marked with fine fpiral flrise, and have the Qpe:i. moi"2 

 acute than in adults. 



This fpecies is fo various in fliape and markings in itj 

 infant ftate, that it has frequently been miftaken for a diffe- 

 rent fliell : and we fufpect a variety is the T. obtufaius of 

 LiNN.E'u's, figured in Chemnitz vol. v. t. 185. a. b. c. d. 

 e. f. Such are not uncommon on our fliores : the flrias 

 on fome are numerous and fmall ; others deeply fulcated, 

 and the ridges fliarp, and a little reflexed: fome marked 

 with narrow fa/cia', others with one white band only on 

 the body. Frequently found of an orange-yellow, finely 

 flriated all over; the upper volutions fcarce diftinguifliable 

 from the ftrirc, and fomctimes of a different colour. 



A variety elegantly chequered witlT.brown and white j 

 (more rare) is alfo figured by Chemnitz. 



The litlorcus, ufually known by the name of Peri- 

 toinkle, is frequently taken and fold by meafure in many 

 of our fea-port towns. 



Animal fl:riped with black: tcntacula two, felaceous, 



not 



