CORALLINE OOLITE. 129 



Pinna lanceolata ... ... PI. IV. fig. 33. Malton ; also in calcareous 



grit. 

 Perna quadrata (Lister, tab. cccclxxvii. and Min. Conch, tab. Malton, &c. also in middle 



ccccxcii.) two varieties of it PL IX. fig. 21. oolite. 



Gervillia. 1. aviculoides (Min. Conch, tab. Ixvi.) Filey, Scarborough, Malton, 



towards the bottom of the 

 rock ; also in calcareous 

 grit, Oxon. 

 2. another very large species Malton. 



Avicula. 1. expansa ... ... PI. III. fig. 35. Malton ? also in the middle 



oolite ? 



2. ovalis, the upper valve is flat fig. 36. Malton, Scarborough ; also 



in calcareous grit. 



3. elegantissima (Bean ) ... Pi. IV. fig. 2. Malton. 



4. tonsipluma (Young and Bird, PI. V1F. fig. 15.) Ditto. 



Plagiostoma. 1. laeviusculum (Min. Conch, tab. ccclxxxii.) Malton, Castle Howard, &c. 

 (three distinct varieties.) also Oxon, and in the cal- 



careous grit, Oxon. 



2. rigidum ( Min. Conch, tab. cxiv. fig. 1.) Malton, &c. also Oxon. 



3. rusticum (Min. Conch, tab. ccclxxxi.) Malton, &c. also in calca- 



reous grit, Oxon. 



4. duplicatum (Min. C. t. dlix.) PI. VI. fig. 2. Malton, &c. 

 Pecten.-"-!. abjectus ... ... PI. IX. fig. 37- Malton and Oxon ; also in 



the calcareous grit and 

 middle oolite. 



2. insequicostatus ... PL IV. fig. 10. Malton ; also in calcareous 



grit, Oxon. 



3. cancellatus (Bean, MS.) Malton, a large species; also 

 (closely allied to P. cinctus (Min. Conch.) Sutherland. ? 



4. demissus ... PL VI. fig. 5. Malton, &c. and in middle 



polite, &c. 



5. lens (lens et arcuatus, Min. Conch, tab. ccr.) Malton, &c. also in several 



of the lower strata. 



6. viminalis (Min. Conch, tab. dxliii. fig. i, s.) Malton, Pickering, &c. also 



Oxon and Wilts. 

 7- vagans (Min. Conch, tab. dxliii. fig. s, 4, .) Malton ; also Oxon, and in 



calcareous grit. 

 Lima rudis (Min. Conch, tab. ccxiv.) Malton, and in calcareous 



grit. 

 S 



