PLATE XXVII— Concluded. 



PAGE. 



Pig. 22. DalmaniTES WERTHNERi Foerste ••■-. 530 



22. Head. S. H O. 



Fig. 23. Dalmanites werthneri Foerste 530 



23. Pygidium. S. H. O. 



Fig. 24. Dai,manites WERTHNERi Foerste 530 



24. A specimen preserving a part of the bony. S H. O. 



Fig. 25. Dalmanites werthneri Foerste 530 



25. An eye magnified. S. H. O. 



Fig. 26. Encrinurus punctatus Wahlenberg 531 



26. Pygidium used as type of E. Thresheri. S. H. O. In cabinet of Mr. B. B. Thresher 

 Fig. 27. Dictvonema PERTENUE Foerste v 600 



27. A frond; b, part of the same magnified showing also the distance at which the pores 



- are situated. S. H. O. 

 Fig. 28. Dictvonema scaIvARiForme Foerste 600 



28. A frond. S. H. O. 



Fig. 29. Dictvonema scalariforme Foerste 600 



29. A part of the latter magnified. S. H. O. 



Fig. 30. Pterinea brisa Hall 557 



SO, Left valve. B. O. 

 Fig. 31. Strophomena (orthothetes) tenuis Hail 568 



31. A brachial valve. S. H. O. 



Fig. 32. Strophomena (orthothetes)tenuis Hall 568 



32. A pedicle valve. S. H. O. 



Fig. 33. BELLEROPHON (bucania) TRILobaTus Sowerby 549 



33. Two views. H. O. Marl. 



Fig. 34. Strophomena (orthothetes) hanoverensis Foerste 567 



34. A pedicle valve referred to this species, forms of this type are moderately convex, 



and the posterio-lateral angles are not produced so prominently beyond the sides 

 of the valves as in the figure, which obtained its character from the accidental 

 manner in which it was exposed in the rock. T. F. O. 



Fig. 35. Strophomena (strophonella or amphistrophia possibly) pa- 



tenta Hall 569 



35. Pedicle valve, beginning to be reflexed at the margin. S. H. O. 



Fig. 36. Strophomena patenta Hall 569 



36. Pedicle vaive, already quite reflexed anteriorly, but not a nature specimen. F. O. 

 Fig. 37. Strophomena patenta Hall 569 



37. Brachial valve, young specimen, not at all bent towards margin. S. H. O. 



Fig. 38. Strophomena (orthothetes) tenuis Hall 568 



38. A portion of a few plications enlarged. S. H. O. 



Fig. 39-41. Crinoidai, remains. 



39. Basal part of several arms. C. O. 40 and 41. Base of calyx, Reeds Hill, Ohio. 



42 and 43. Plates of calyx. S. H. O. 41. Specimen of unknown relations. S. H. O. 



