Cytheropteron nodosum. 



34. 

 35. 



36. 



37. 

 38. 

 39. 

 40. 



PLATE VIII. 



Locwconcha impressa. Carapace of female, seen from left 



side. 



— — „ „ above. 



— — „ ,, below. 



— — „ „ front. 



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



— — „ „ above. 



— — Left valve of male, „ side. 



Loxoconcha tamarindus. Carapace of female, seen from left" 



side. 



— — „ „ above. 



— — „ „ front. 



— — Carapace of male, ,, left side. 



Carapace, seen from left side. 

 „ ,, above. 



— — „ ,, below. 



— — „ „ front. 



Cytheropteron arcuatum. Left valve, seen from side. 



— — „ „ below. 



— — „ „ front. 

 Cytheropteron latissinmrn. Carapace of male, seen from left 



side. 



— — „ „ above. 



— — ,, „ below. 



— — „ „ front. 



— — Carapace of female, seen from ) 



right side. J 



Cytheropteron inflatum. Right valve, seen from side. 



— — „ „ above. 



— — „ „ below. 



— — „ „ front. 

 Cytheropteron Montrosiense. Left valve of female, seen 



from outside. 



— — ' „ above. 



— — „ below. 



— — ,, front. 



— — Right valve of female, seen 



from above. 

 Carapace of male (?), seen 

 from left side. 



,, above. 



„ below. 



„ front. 



Carapace, seen from left side. 

 „ „ above. 



„ „ below, 



front. 



Fig, 

 1. 



2. 

 3. 

 4. 



5. 

 6. 



7. 



8. 



9. 

 10. 

 11. 



12. 

 13. 

 14. 

 15. 



16. 

 17. 

 18. 



19. 



20. 

 21. 

 22. 

 23. 



24. 

 25. 

 26. 

 27. 



28. 



29. 

 30. 

 31. 

 32. 



33. — 



Cyth crop teron angulatum . 



(Oban, Raised-beach.) 



(Drip Bridge, Stirling.) 



(Dalrauir.) 

 (Greenock new Dock.) 



(Dumbarton.) 

 (Errol.) 



(Kilchattan.) 



(Montrose.) 

 (Errol.) 



(Montrose.) 



(Annochie Brick- works.) 



(Dumbarton.) 



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



