EXPLANATION OF PLATE 11. 





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Fig. 1. DiCRANURUs : Conrad, Annual Report f(Jr 1841, p. 48. 



Fig. 2. AspiDOLiTES : Conrad, Annual Report 1841, p. 48. 



Fig. 3. AciDASPis TUBERCULATus : Courad, Annual Report 1840, p. 205. 



Fig. 4. Ctpricardites : Conrad, Annual Report 1841, p. 51. 



Fig. 5. Ltrodesma : Conrad, Annual Report 1841, p. 51. 



Fig. 6. Orthonota undulata : Conrad, Annual Report 1841, p. 50. 



Fig, 7. NucuLiTEs cuNEiFORMis : Conrad, Annual Report 1841, p. 50. 



Fig. 8. N. OBLONGATUS : Conrad, Annual Report 1841, p. 50. 



Fig. 9. AsAPHus ADSPECTANS : Courad, Annual Report 1841, p. 49. 



Fig. 10. Atrypa unisulcata : Conrad, Annual Report 1841, p. 56. 



Fig. 11. Atrypa peculiaris : Conrad, Annual Report 1841, p. 56. 



Fig. 12. PosiDONiA LiRATA : Courad, Annual Report 1838, p. 116. 



Fig. 13. AvicuLA BELLA : Conrad, Annual Report 1841, p. 54. 



Fig. 14. Atrypa elongata : Conrad, Annual Report 1839, p. 65. 



Fig. 15. Platyceras sulcatus : Conrad, Annual Report 1841, p. 56. 



Fig. 16. Orthostoma communis : Conrad, Annual Report 1838, p. 119. 



Fig. 17. Atrypa acutiplicata : Conrad, Annual Report 1841, p. 54. 



Fig. 18. Delthyris mucronata : Conrad, Annual Report 1841, p. 54. 



Fig. 19. Cyrtolites : Conrad, Annual Report 1838, p. 118. 



Fig. 20. Conularia laqueata : Conrad, Annual Report 1841, p. 57. 



Fig. 21. Cypricardites carinata : Conrad, Annual Report 1841, p. 53. 



Fig. 22. Dictuocrinites : Conrad. 



