PLATE XXXI. 

 Peotocabdia (continued) . 



Figs. 



1. P. anglica, Woods. Lower Greensand (Crackers), Athcrfield. Sedgwick 

 Museum, Cambridge. Right valve. (P. 194.) 



2, 3. P. spliseroidea (Forbes). Lower Greensand (Perna-bed). (P. 195.) 



2. Sundown. British Museum, No. L8247. a, left valve; l, dorsal view of the 



same specimen, x £. 



3. Atherfield. York Museum. «, left valve; b, posterior view of the same, x ^. 



4. P. sp. Upper Greensand, Haldon. British Museum, No. L17041. 



Right valve. (P. 196.) 



5. P. sp. Speeton Clay (zone of Belemnites lateralis), Speeton. Mr. Lamp- 



lugh's Collection, a, right valve X 2 ; b, dorsal view of both valves 

 X 2. (P. 197.) 



G. P. Hillana (Sow.). Upper Greensand, Blackdown. Sedgwick Museum. 

 a, left valve; h, posterior view of a ; c, part of the posterior area 

 X 4. (P. 197.) 



