PLATE II. 



Fig. 



1 — 3. Back, front, and side views of Plagiophlhalmus oviformis (p. 9), from the Green- 

 sand of Wiltshire. In Mr. Cunnington's collection. 



4 — 6. Back, front, and side views of Ilemioon Cunningtonii (p. 10), from the Greensand 

 of Wiltshire. In Mr. Cunnington's collection. 



7. Under view of a specimen of the same, from the Cambridge Bed. In the author's 

 collection. 



8 — 10. Upper, side, and under views of Palaocorgstes Broderipii (p. 14), after speci- 

 mens in Dr. Bowerbank's collection, from the Gault at Folkestone. 



11. Specimen showing the anterior pair of legs, from the same locality. In the author's 



collection. 



12. Under side of the same, showing the basal joint of the legs, and part of the footjavvs. 



13. Diagram of the abdomen, of the same species. 



14. Eitcorystes Carteri (p. 17), from the Greensand of Cambridge. In Mr. Carter's 



collection. 



15. Under side of a small specimen of the same. 



16. Front view of the same species, showing the large and distant orbits. 



17. Restored view of the carapace of the same species. 



