PLATE XV. 



AsTARTE {rontiniiciJ). 



Fios. 



1,2. A. i^iihaislKfa, d'Orli., var. Lo^\'er Grcensand (Crackers), AllieiHcld. 

 Sedgwick Museum. (P. 110.) 



1 a, ritjht valve, x I3 ; i, anterior view, x H. 



2 n, right valve, x li; ft, dursal view, x 1^. 



3, 4. A., sp. Folkestoue Beds, Folkestone. 3, risjlit vnlve ; 4, left valve. 

 Sedgwick Museum. (P. 111.) 



5-7. A. Omrdiniih's, AVoods. Gault, Folkestoue. British Museuui, No. L 4958. 

 5, 7, left valves; (i, right valve. X 2. (P. 111.) 



8-13. A. furmosa, Sow. Upper Oreensnud. Blaekdowu. Sedgwiek Museum. 

 All X 3. (P. 112.) 



8. Left valve. 

 9 fT, left valve ; h, interior. 

 \0n, right valve; /), dorsil view ; c. anterior view. 



11. Left valve. 



12. Interior of right valve. 



13. Eight valve. 



14. A. imjHiJita, Sow. Upper Greeusaud, Blaekdowu. The Tvpe. Bri.stol 

 Museinu. Right valve. (P. 113.) 



15-18. A. {Evijihijlii) iihtinifii, Sow. Lower (ireeusaud (/'///("-Ijed). Sedgwick 

 Museum. (1'. 113.) 



1.5. Atherfieia. Right valve. 



IG. Sandown. Right valve. 



17. Atherfield. o, left valve; //, dorsal view. 



18. Sandown. a. right valve : b. hinge. 



