232 j. p. blake on the kimmeeidge clay of england. 



Serpttla rtjncinata (Sow.). 



8. triserrata, Sowerby, in Fitton, I. c. tab. 23. fig. 8. 



Eryma Babeatji (Oppel, Pal. Mitth. tab. 10. fig. 3, p. 42). 



Kpseudobabeaui (Dollf., * Faune Kim. de la Heve,' pi. 1. figs. 1, 2). 



Oppel's name was given to the claws ; Dollfus's to" the carapace, 

 which he thought might belong to Oppel's claws, though none such 

 were found. Having found carapace and claws in the same bed, 

 though not belonging to the same animal, I presume Dollfus is 

 correct in his surmise, and both must be called E. Babeaui. 



In the small oyster-bed, Passage-beds, Weymouth. 



SCALPELLUM BETICTJLATTJM, n. Sp. PL XII. fig. 1. 



Only the carina known ; which is moderately curved (radius fin.), 

 length 3| times the greatest breadth ; ornaments concentric folds, 

 which appear, under a magnifier, crossed by longitudinal striae, espe- 

 cially near the apex. Length \ in. 



A single specimen in Lower Kimmeridge, Swindon. 



EXPLANATION OF PLATE XII. 



Fossils from the Kimmeridge Clay. 



Kg. 1. Bcalpellum reticulatum : carina, nat. size. 1 a, portion magnified. 

 Swindon. 



2. Avicula cedilignensis. Woodhall Spa. 



3. Avicula nummulina. Market Easen. 



4. Area longipunctata. Market Easen. 4 a, portion magnified. 



5. Nucula obliquata. Market Easen. 



6. Cyprina cyreniformis. Woodhall. 



7. Inoceramus expansus. Market Easen. 



8. Lucina minuscula. Market Easen. 



9. Lima atdilignensis. Woodhall Spa. 9 a, portion magnified. 



10. Pholadidea abbreviata. Market Easen. 



11. Area reticulata. Market Easen. 11a, portion magnified. 



12. Leda lineata. Market Easen. 



13. Cerithium forticostatum. Market Easen. 



14. Cerithium crebrunn. Market Easen. 



15. Cerithium multvplicatum. Swindon. 



16. 17. Bostellaria rasenensis. Market Easen. 



Discussion. 



Prof. Seeley complimented the author on the elaborate palseonto- 

 logical details which he had correlated in his paper. He noticed that 

 the Kimmeridge Clay is thinnest in the neighbourhood of Ely, and 

 thickens to the north, in Lincolnshire, and also southward, and that 

 this southward thickening is concomitant with a development of 

 sandy beds at the base and, less markedly, also at the top. As the 

 formation is traced into France by way of Boulogne the sandy cha- 

 racters become more strongly marked, and eventually the deposit 

 can no longer be recognized as a^ clay, though westward, at Havre, 



