PLATE XI. 



Fig. 



1 — 3. Dorsal views of Phlyctisoma tuberculatum (p. 33), showing the linear insulated naso- 

 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. 



9, 10. Dorsal view of Phlyctisoma yranulatum (p. 36). 



11, 12. Dorsal view of the carapace of Glyp/itsa cretacea (p. 37). 



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



14. Side view of the carapace of Glyphcea Carteri (p. 38). 



15. Etyus similis (p. 39). 



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



The specimens in this Plate are all from the Upper Greensand at Cambridge, and in the 



collection of Mr. Carter. 



