Class VI. NERITA. NERITE. 345^ 



Grn. Lin. 3672. N. nitida. Mont. Test. 3. mammil- 



Lin.Tr.\m. 225. ', Br. Sup. UQ. .•' ^^• 



* N. with an umbilicated ovate smooth shell ; . " 

 umbilicus covered ; aperture ovate ; size of the 

 end of a thumb. 



Coast of Caithness. ■ . 



Lin. Syst. 1253. No. 723. Faun. Suec. No. 2194. 4. fluvia- 



Gm. Lin. 3676. Lin. Tr. viii. 225. Tins. 



Y2V€T 



List. Angl. tab. ii. fg. 20. Mo7it. Test. Br. 470. 



Conch: tab. 141 . Jig. 38. 



N. with only two spires ; brittle, dusky, mark- 

 ed with white spots ; not half the size of a pea» 

 Inhabits still rivers and standing waters. 

 Tab. xc. fg. 2. 



Lin. Tr. viii. 226. Mont. Test. Br. 468. 5. palll 



DULA. 



* N. with an umbilicated smooth shell ; umbi' 

 licus deep, and lengthened ; size of a pea. 

 Kentish, Western coast and Shetland. . 



