PLATE XXXVIIa— Concluded. 



PAGE 



Fig. 17. Crania dubia, Foerste 565 



17. a, Shell from Soldiers' Home, O ; b, shell from Hanover, Ind.: no details of struc- 



ture are visible in either case. 



Fig. 18. Cycxospira sparsi-pucata, Foerste 59-3 



18. a, Pedicle valve ; b, lateral view 



Fig. 19. Orthis fausta, var. squamosa, Foerste 574 



19. a, Brachial valve ; b, lateral outlines. Carrollton pike quarry, about half a mile 



west of the Soldiers' Home, on the south side of the pike. 



Fig. 20. Orthis ( Dinorthis ) caixigramma, var. fissiplicata, Foerste 573 



20. a, Pedicle valve ; b, lateral outlines. Huffman's quarry, Ohio. 



