Class VI. TROCHUS. TOP, 289 



Lin. Tr. viii. 152. Br. 284. 3. mneatus, 



T. cinerarius. Mont. Test, Br. Zool. iv. 127. cinereous. 



Tr. with a perforated base ; spires a little pro- 

 minent. Of a cinereous color, striped obliquely. 

 Size of a pea. 

 Anglesey. 



List. Conch, tab. 641. Jig. 31, Lin. Tr. viii. 153. 4. umbili- 



32. Mont. Test. Br. 286. catus. 



List. Angl. tab. m. Jig. 15. T. umbilicaris. Br. Zool. iv. 



126. 



Tr. with a perforated base, and of a convex 

 conic form : dirty white waved with purple. 

 Varies much in colors. 



A most common shell on all our shores. 

 Tab. lxxxiii. Jg. 3. 



Lin. Tr. viii. 153. Mont. Test. Br. 280. /. 10. 5. TUMIDUS. 



/.4. 



* Tr. with a somewhat conic striated shell, 

 volutions plane, prominent ; minute ; inhabits 

 the sea. 



Devonshire coast, adhering to shells. 



vol. iv. u 



