-290 TROCHUS. TOP. Class VI. 



6. Fuscus. Lhi. Tr. viii. 154. 



* Tr. with an umbilicated shell, and five mar- 

 gined volutions ; aperture nearly circular j mi- 

 nute ; inhabits the sea. 



Perhaps a variety of T. tumidus ? 

 Common near Sandwich. 



** Imperforated, erect, umbilicus closed. 



7. CRASSUS, Lin. Tr. viii. 154. Mont. Test. Br. 281. 



* Tr. Avith a somewhat ovate imperforated 

 shell; columella with one tooth; length one 

 inch, diameter nearly the same ; inhabits the 

 sea. 



Found in abundance on the western coast 

 and elsewhere. 



8. PAPILLO- Lin. Tr. viii. 155. Mont. Test. Br. 275. t. 10. 



SUS. /. 3. 



* Tr. with an imperforated conic shell ; volutions 

 rather plane, Avith two nodulated lines along each 

 volution ; base tumid. 



Ccrmiall, Poole, and Weymouth. 



