Class VI. NER1TA. NERITE. 347 



Mont. Test. Br. Sup. 150. t. 2g. f. 5. g. tubero- 



SISSIMA. 



* N. with a white pellucid shell, having three 

 or four volutions ; on the body whirl are four 

 elevations broken into tubercles ; upper volu- 

 tions very small ; apex minute ; umbilicus 

 large ; diameter one eighth of an inch. 

 Inhabits the Frith of Forth. 



Mont. Test. Br. Sup. 150. t. 30. f. 3. 10. rupa, 



* N. with a glossy smooth purplish shell; round 

 the top of the volutions a white band, and on 

 the body whirl two others ; diameter more than 

 half an inch. 



Mem. Wern. Soc. 40g. 11. LvEVida. 



* N. a new shell, it bears some resemblance 

 to N. glaucina, but differs in having a more 

 produced apex, and wanting the markings of 

 that shell. 



Found near Dunbar. 



