PLATE XXXI. 



Pecten {continnci]). 



¥ios. 



1,2. P. {Ghhiui/s) brlfannicus, Woods. (P. 107.) 



1. Dr. Blackmore's Collection. Ui>per part of M. cor-anguinum zone, Stratford, 



near Salisbury, a, part of valve ; h, same x 4. 



2. Mr. Gr. E. Dibley's Collection. 31. cor-anguinum zone, Haling Pit, South 



Croydon, a, left valve ; h, part of the same x 3. 



3—6. P. {CMamijs) Millcri, Sow. Greensand, Blackdown. Woodwardian Museum. 

 (P. 168.) 



3. Meyer Collection, a, left valve ; h, part of the same near the umbo x 6. 



4. Wiltshire Collection. a, right valve X 2. The anterior ear is drawn from 



another specimen in the same collection. 



5. Wiltshire Collection. Right valve. Ornamentation jiist above the middle of 



the valve X 6. 



6. Meyer Collection, a, left valve ; b, postero-ventral part of the same X 3. 



7—9. P. {Ghlamy^) .^iihacutux, Lam. (P. 169.) 



7, 9. Meyer Collection. Bed 11 (Cenomanian), Dunscombe. 7a, right valve; 

 7 b, part of same x 3. 9, ribs of another right valve near the middle of the 

 valve X 3. 

 8. Museum of Practical Geology, No. 6683. G-reensaud, Haldon. «, right valve; 

 b, part of sanie in the middle of the dorsal third x 4 ; c, part near middle of 

 ventral border x 4. 



10 — 13. P. {PhJ((iui/s) ehtiKjiitiis, Lam. Woodwardian Museum. (P. 170.) 



K), 11. Wiltshire Collection. Gault, Folkestone. 10, left valve. 11 «, left valve; 

 11 6, part of same X 3. 



12. Wiltshire Collection. Chalk Marl, Ventnor. a, left valve ; b, postero-ventral 



part of same x 2. 



13. Totteruhoe Stone, Arlesey. Eight valve. Ribs near the middle of the ventral 



border x 4. 



