PLATE XI. 



Fig. 



1 — 3. Dorsal views o{ PJd^clisoma tuberculatum (p. 33), showing the hnear insulated nieso- 



gastric lobe. 



4, 5. Side view of the carapace of the same. 



6. Part of the carapace, and the abdomen of the same. 



7, 8. Portions of the arms, wrist, and hand of the same. 



'.), 10. Dorsal view oi PhtyctiHoma (jrdnulatum (p. 36). 



11, 12. Dorsal view of the carapace of Glyphma cretacca (p. 37). 



13. Portion of one of the legs of the same species. 



14. Side view of the carapace of Gli/phcea Carteri (p. 38). 



15. Eti/us similis (p. 39). 



IG. A remarkable variety of Eucorystes Carteri (p. 39). 



The specimens in this Plato are all from the Upper Greensand at Cambridge, and in tin- 



collection of Mr, Carter. 



