PLATE VIIL 



Loxoconcha impressa. Carapace of female, seen from left 



side. 



— — „ „ above. 



— — „ ■ „ below. 



— — „ „ front. 



Loxocoyicha guttata. Left valve of female, seen from side. 



— — „ above. 



— — Left valve of male, ,, side. 



LoxoconcJia tamarindus. Carapace of female, seen from left' 



side. 



— — „ „ above. 



— — „ „ front. 



— — Carapace of male, ,, left side. 



Cytlieropteron nodosum. Carapace, seen from left side. 



— — „ ,, above. 



— — „ below. 



— — „ „ front. 

 Cytheropteron arcuatum. Left valve, seen from side. 



— — „ „ below. 



— — „ „ front. 



Cytheropteron latissimum. Carapace of male, seen from left 



side. 



— — „ „ above. 



— — „ „ below. 



„ front. 



Carapace of female, seen from | 



Fig. 

 1. 



2. 



3. 

 4. 



5. 

 6. 

 7. 



8. 



9. 

 10. 



n. 



12. 

 13. 

 14. 

 15. 



16. 

 17. 



18. 



19. 



20. — 



21. — 



22. — 



23. — 



right side. 



24. Cytheropteron injlatum. Right valve, seen from side. 



25. — — j> 3j above. 



26. — — j> jj below. 



27. — — ,, „ front. 



28. Cytheropteron Mo?itrosiense. Left valve of female, seen 



from outside. 



29. — — ' „ above. 



30. — — „ below. 



31. — — „ front. 



32. — — Right valve of female, seen 



from above. 



33. — — ■ Carapace of male (?), seen 



from left side. 



above, 

 below, 

 front. 



34. 

 35. 

 36. 



37. 

 '38. 

 39. 

 40. 



(Oban, Raised-beach.) 



(Drip Bridge, Stirling.) 



(Dalmuir.) 

 (Greenock new Dock.) 

 (Dumbarton.) 



(Errol.) 



(Kilchattan.) 

 (Montrose.) 

 (Errol.) 



(Montrose.) 



(Annochie Brick-works.) 



Cytheropteron angulatum. Carapace, seen from left side.' 



— — }j » above. 



— — „ „ below. 



— — „ „ front. 



(All X 40, except C. arcuatum, which is X 50.) 



(Dumbarton.) 



