BY E. M. JOHNSTON, F.L.S. 



67 



(a) Bivalve shells minute, ovate, thin, 

 olive or white. (Pisidium) 

 Minute, sub-quadrate, thin, yel- 

 lowish. (Sphasrium or Cyclas.) 



Shell, large, oblong-oval, blackish 

 epidermis; umboes eroded, pearly 

 inside 



Oyrenidse, lxxxi. 



Unionidse, xc. 



List of the Various Authors who have Described 

 More than one Local Species, Arranged According 

 to the Order op their Importance Locally. 



1. Tenison- Woods ... 



2. Lamarck ... 



3. Reeve 



4. Sowerby ... 



5. Petterd ... 



6. Cox 



7. Deshayes ... 



8. Brazier ... 



9. Quoy 



10. A. Adams 



11. Gray 



12. Beddome... 



13. Angas ... ... 



14. Crosse 



15. Linne 



16. Johnston... 



17. Adams and Angas 



18. Swainson 



19. Pfeiffer 



20. Quoy and Gaim . . . 



21. Tate 



22. Chemnitz 



23. Dunker ... 



24. Martyn 



25. Born 



26. H. and A. Adams 



27. G-melin 



28. Philippi 



29. Hinds 



30. Kiener 



31. Stutchbury 



Species Described. 

 No. 

 212 

 59 

 39 

 37 

 37 

 29 

 23 

 19 

 18 

 18 

 17 

 17 

 15 

 10 



9 



9 



9 



9 



8 



8 



5 



5 



5 



4 



3 



3 



3 



3 

 3 

 3 



