DECAPOD CRUSTACEANS OF THE OXFORD CLAY. 559 



Fig. 10. Pseudastacus, sp. St. Ives. First pair of chelae. Nat. size. 



11. Pagums, sp. St. Ives. Portion of first pair of limbs. Nat. size. 



12. Pseudastacus ? serialis, nov. sp. Fletton, Hunts. Propodite of first 



pair of limbs, Nat. size. (From cabinet of A. N. Leeds, Esq., 

 Eyebury, Peterboro'.) 



13. Mecochirus Pearcei, M'Coy, sp. Christian Malford. One of the 



specimens originally determined by Prof. M'Coy (Ann. Nat. Hist. 

 1849) and now in Woodwardian Musemn. 



13 a. — — . Limb of the first pair. (From a specimen in the 



Jermyn St. Museum.) Nat. size. 



