﻿PLATE X. 



Leiopteria lingulata, n. sp. (Page 78.) 



Fiu. 



1. Left valve, somewhat defective about the wings. Wolborough. British 

 Museum. 



Pterinopecten gracilinus, Whidborne, sp. (Page 80.) 



2. Large and nearly perfect specimen of the left valve showing the alternating 



ribs ; 2 a, portion of surface enlarged. Wolborough. Lee Collection. 



3. Still larger left valve, somewhat obscure round the margins ; 3 a, portion of 



surface enlarged. Wolborough. Vicary Collection. 



Ckenipecten ? comma, Wliidborne, sp. (Page 88.) 



4. Left valve, showing hind wing ; 4 a, portion of surface enlarged. Lummaton. 



My Collection. 



5. Another specimen, defective in front, but apparently rather more produced in 



the antero-superior part ; 5 a, portion of surface enlarged. Lummaton. 

 My Collection. 



Crenipegten ? Oceani, Goldfuss, sp. (Page 89.) 



6. Specimen figured by Phillips as Peden plicatus, Sowerby. Wolborough. 



Museum of Practical Geology. 



Aviculopecten aviformis, Whidborne. (Page 85.) 



7. Specimen of the umbonal half of a left valve showing the character of the 



radiations ; 7a, portion of surface enlarged. Lummaton. My Collection. 



8. A large and very transverse specimen; 8 a, portion of surface enlarged. 



Lummaton. My Collection. 



9. Another specimen defective behind ; 9 a, portion of surface enlarged. Wol- 



borough. Vicary Collection. 



10. Another transverse specimen; 10 a, portion of surface enlarged. Lum- 



maton (?). Torquay Museum. 



11. A much less transverse specimen; 11 a, portion of surface enlarged. Wol- 



borough. Vicary Collection. 



