NORTH BRITISH TESTCEA. 



397 



Bulla. 



5. patula. 



6. haliotoidea. 



7. cylindracea. 



8. truncata. 



9. obtusa, 

 10. hydatis. 



11. akera. 

 resiliens 



a. "f 



iens. S 



12. umbilicata. 



13. subtruncata. 



P. D. M. On PortobeHo Sands, very 

 rare. 



M. Portobello Sands, rather 

 scarce. 



P. D. M. Tyne Sands, scarce. More 

 plentiful near Gosford- 

 House, Aberlady Bay ; 

 but mostly dead shells. 

 Not uncommon among the 



sand near Dunbar. 

 Near Dunbar, very rare. 

 A small specimen occurred 

 on the sands near Dunbar, 

 very rare. 

 A young shell was found on 

 the sands at Belhaven, 

 near Dunbar. 

 A specimen of a large size 

 was taken by the dredge 

 off Dunbar. 

 A new species from Dunbar, 

 very rare. 



M. 



M. 

 D.M. 



M. 



M. 



M. 



VOLUTA. 



Animal a Limax. Shell one-celled spiral. A- 

 perture without a beak, and somewhat effuse. 

 Pillar twisted or plaited, generally without lips 

 or perforation. 



