PLATE IX. 



Fig. 

 1, 2. Abdomen of Astacodes falcifer (p. 30), from a specimen in the British Museum, 



formerly in Mr. Bean's collection. 

 3-5. Fragments of the carapace of the same. In the museum, at York. 



6. A hand, in the same collection, marked, as belonging to this species, which is 



doubtful from its great size. 



7. Portion of the abdomen, and 8, the hands of a species, named by Mr. Bean, 



" Astaeus multicostatus" (p. 31). In the British Museum. 

 9, 10. Carapace and abdomen of Meyeria ornata (p. 33). In the museum, at York. 

 11. Anterior portion of the carapace of the same. In the British Museum. 



All the specimens figured in this plate are from the Speeton Clay. 





