Ox 
PATH ALT: 
PHoLapomyA (continued). 
P. gigantea (Sow.). Lower Greensand (Crackers), Atherfield. Sedgwick 
Museum. Dorsal view of specimen figured on Plate XL. (P. 246.) 
P. Cornueliana (dV’Orb.). Lower Greensand (Crackers), Atherfield. Sedg- 
wick Museum, Cambridge. 2a, right valve; 0, dorsal view; 3, right 
valve. (P. 245.) 
P. speetonensis, Woods. Speeton Clay, Speeton. Museum of Practical 
Geology, No. 23620. a, left valve; b, dorsal view. (P. 248.) 
P. Martini, Forbes. Lower Greensand (Crackers), Atherfield. Sedgwick 
Museum. Right valve. (P. 249.) 
P. Fabrina, VOrb. Gault, Black Ven. Sedgwick Museum. Right valve, 
compressed dorso-ventrally. (P. 250.) 
P. decussata (Mant.). Chalk Marl. (P. 250.) 
7. Eastbourne. Sedgwick Museum. Right valve. 
8. Ventnor. Sedgewick Museum, Dorsal view. 
9. Ventnor. Sedgewick Museum. Anterior view. 
