NORTH BRITISH TESTCEA. 



Nerita. 



5. nitida. "i D. Dunbar, very scarce, 

 mamilla. 3 M. 



6. tuberosissima. M. A new and elegant species, 



taken by the dredge in the 

 Frith of Forth. A single 

 specimen only has been 

 met with. 



7. laevida. Laskey. A new shell found near Dun- 



bar, since the publication 

 of Appendix to Test. Brit, 

 of Montagu. It bears 

 some resemblance to N. 

 glaucina, but has a more 

 produced apex, and is di- 

 , vested of the markings of 



that shell. 



HALIOTIS. 



Animal a Limax. Shell univalve, dilated, ear- 

 shaped, with a longitudinal row of orifices along 

 the surface. Spire lateral, and nearly conceal- 

 ed. 



i. tuberculata, P.D.M. A single broken specimen 



was found on the Sands of 

 Leith j but I have doubts 

 whether this shell is real- 

 ly indigenous, 



