SUPPLEMENT, PLATE XIL 



Fig. 



1, 2, 3. Leptana sef/menturn , var. cornuta, Dav. Middle Wenlock shale, Coal Brook 



Dale Railway Station, half mile from 

 Buildvvas Abbey, Shropshire. Figs. 

 1, 2, 3. Nat. size. (P. IGG.) 



4, 5, C, 7. „ sericea, var. rhombica, M'Coy. 4. Caradoc, Duntereleugh Burn, 



Leadhill District, Dumfriesshire. Coll. 

 Geol. Survey of Scotland. 5, Llan- 

 deilo, Balcletchie. G, Llandeilo, Craig- 

 head, Girvan. Coll. of Mrs. R. Gray. 

 7. Literior of dorsal valve, enlarged. 

 (P. 169.) 



8,9,10. „ sericea, ^ov^\ Llandeilo, Craighead, Girvan. 9. Middle Caradoc, 



Shallock Mill, Girvan. 10. Llandeilo, 

 Balcletchie, Girvan. All in the coll. 

 of Mrs. R. Gray. (P. 169.) 

 11, 12. „ Etheridgei, Dav. Llandeilo, Craighead, Ayrshire. Coll. of Mrs. 



R. Gray. 12 «. Interior of dorsal 

 valve, enlarged. (P. 170.) 



13. ,, quinquecostata, ^i^Goy. Llandeilo, Ardmillan Brae, Girvan. 13 a, 



13 b. Enlarged. Coll. of Mrs. R. 

 Gray. (P. 169.) 



14, 15, 16. „ Younpana, Dav. 16. Interior of dorsal valve, enlarged. Llan- 



deilo, Craighead, Girvan. Coll. of 

 Mrs. R. Gray. (P. 168.) 



17 — 21. „ tenidcincta, M'Coy. Llandeilo. 17, 18, 19. Varieties in form. 



Llandeilo, on Balcletchie Conglomerate, 

 Balcletchie, Girvan. Coll. of Mrs. R. 

 Gray. 20. Interior of dorsal valve. 

 Balcletchie. 21. Internal cast. Caradoc, 

 Kilbucho, Peebleshire. Coll. of the 

 Geol. Survey of Scotland (see also PI. 

 XI, fig. 28). (P. 168.) 



22. „ scissa, Salter. Upper Llandovery, Minsterley, Salop. Coll. of 



Mr. R. Phdip. 22 a, b. Interior of 

 ventral valve, enlarged. (P. 170.) 



23 — 25. „ GraycE, Dav. Llandeilo, Craighead, Girvan. Coll. of Mrs. 



R. Gray. (P. 171.) 



26—29. „ Llandciloensis, Dav. Llandeilo. 26. Ardmillan Brae. 27—29. 



Craighead, Girvan. 26—28. Coll. of 

 Mrs. R. Gray. 29. Hunterian Museum, 

 Glasgow. (P. 171.) 



30. Strophomena 81iallocUensis, Dav. Upper Caradoc, Cynyd beds, near Corwen, 



Merionethshire. Collected by Mr. J. 

 Parrott. (P. 192.) 



