Mr. Tate on the Berwiclcshire Mountain Limestone Fauna. 153 



11. P. Martini, Sow. M. 0. t. 317, f. 2—4. 

 In limestone, Berwick. 



12. P.punctatus, Mart. Sow. M. C. t. 323 ; Phil. G. Y. 2, t. 8, f. 10. 

 In limestone, Berwick. 



13. P. scabricuhis, Mart. t. 36, f. 5. 

 In calcareous shale, Berwick. 



14. P. setosiis, Phil. G. Y. 2, t. 8, f. 9, 17. 

 In impure limestone, Berwick. 



15. P. Flemingii = P. longispinus, Sow. M. C. t. 68, f. 1, 2. 

 In calcareous shale, Berwick. 



Genus — Chonetes. Fischer. 



16. C. sordida, Sow. Geol. Tr. 5, t. 53, f. 5, 16. 

 In shale, Berwick and Marshall meadows. 



Genus — Strophomena. Rufinesque. 



17. S. analoga, Phil. G. Y. 2, t. 7, f. 10. 



In limestone, Lammerton. This species is not generally 

 distributed in Northumberland ; I have found it only at 

 Belford Moor, Bellingham and Eedesdale. De Koninck and 

 Mr. Davidson think that the Carboniferous species is not 

 distinguishable from the Strophomena rhomhoidalis ; if this be 

 correct, the species must have existed during an enormously 

 long period — during the Silurian and Devonian Epocha, and 

 far into the Carboniferous Era. 



18. S. crenistria, Phil. G. Y. 2, t. 9, f. 6. 



In limestone and calcareous shale, Berwick. 

 Genus — Okthis. Dalman, 



19. 0. resupinata, Mart. Derb. t. 49, f. 13, 14. 

 In calcareous shale, Berwick, 



Genus — Spiripee. Sow. 



20. S. lineatus, Mart. Derb. t. 36, f. 3 ;, PhH. G. Y. 2, t. 10, f. 17. 

 In limestone, Berwick. A common species in Northumberland. 



21. S. laminosus, McCoy, Carb. Poss. t. 21, f. 4; Dav. Carb. 

 Brach. t. 7, f. 17—22. 



This pretty shell is ornamented by concentric lamellae crossing 

 longitudinal ribs. It is an interesting addition to Berwick- 

 shire fossils, and was found by me at one of the meetings of 

 the Club, in sandstone, at Lammerton, where it is associated 

 with Avicuh-pecten per a, Carboniferous plants, and Ganoid 

 fish scales. It is rare ; I have seen it in Northumberland only 

 at Denwick, Bellingham, and Eedesdale. 

 Genus — LnsTGuiA. Brug. 



22. L. squamiformis, Phil. G. Y. 2, t. 11, f. 14, 



In shale, Berwick, Marshall meadows. It occurs also at North 

 Sunderland, and at Lemmington, west of Alnwick, in beds low 

 down in the Mountain Limestone series, 



22. Z. mytilloides? Sow. M. C. t. 19, f. 1, 2. 



In shale, Marshall meadows. The specimens are more elon- 

 gate than Sowerby's species. 



Genus — Discina. Lam. 



24, D. nitida, Phil, G. Y. 2, t. 11, f. 10—13, 



In shale, Marshall meadows, associated with the abovenamed 



