2-16 PROCEEDINGS OF IHE GEOLOGICAL SOCIETY [Feb." 5, 



ft. in. ft. in. ft. in. ft. in. 

 9. " The Hard Limestone " — in three or four 



courses, glistening in the fracture from 



the presence of small crystals of car- 

 bonate of lime, frequently blue-hearted, 



and a "first-rate building-stone" (Avi- 



cula Munsteri, Gervillia acuta, Hinnites 



velatus, Lima, sp., Pecten aratus, P., 



small sp., Pteropema pygmcsa, Cardium, 



Buckmani, Ceromya concentrica, Lucina 



Wrightii, Natica LecJchamptonensis, Ne- 



rincea, sp., crustacean, Pseudophyllia, sp., 



Ferns, Pecopteris polypodioides, wood, 



&c. A zone filled with Annelides tra- 

 verses this bed 2 0to3 2 



10. "Bitch" — a soft marly material, good for 



lime-burning, but not for building-stone 



{Pecten aratus). [This and the last beds 



represent 5 of my former section.] 09 00 09 



1-1, "Slates." [These beds, 9, 10, 11, would 



seem all to be included in slate-bed 7 of 



Morris.] 2 to 2 6 1 G to 2' 6 



12. " Sand " — Lower Estuarine with plants. 



In all the sections, some of the beds are divided by thin argillaceous 



seams. 



Fossils from the Beds above the Slates, Collyiveston. 



Avicula Munsteri, Goldf. 

 Gervillia acuta, Sow. 

 Hinnites velatus, Goldf. sp. 

 Lima, large new sp. (allied to L. 

 grandis, Bonier) ? 



, sp. ? 



Ostrea, sp. ? 



Pecten aratus, Waagen. 



lens, Sow.. 



Pteropema pygmrea, DunJecr, sp. 



Cardium Buckmani, Mor. S: Lye. 

 Ceromya concentrica, Sow. 

 Cypricardia nuculiformis, Homer, sp. 

 Lucina Wrightii, Oppel. 

 Modiola Binfieldi (?), Mor. §Lyc. 



Unicardium impressum, Mor. 8f Lye. 



Natica Leckhamptonensis, Lycett. 

 Nerinasa cingenda, Bronn. 

 . sp. ? 



Dentalium (?), new species. 

 Serpula, sp. ? 



Crustacean — 

 Pseudophyllia, sp. ? 



Ferns — 

 Pecopteris polypodioides, Lindley. 

 Wood. 



Connected with the organic contents of the npper beds, the abun- 

 dance of Pecopteris polypodioides, sometimes showing the delicate 

 fructification beautifully preserved, is significant, as it seems to 

 imply that the land surface upon which the Pecopteris grew could 

 not have been very distant. The presence of the characteristic In- 

 ferior Oolite fossil Natica LecJchamptonensis throughout the section, 

 the large new Lima with the shell beautifully preserved, and the 

 small new Dentalium ('?), are also worthy of particular notice. 



Among the numerous fossils of the Slate beds, the little rare shell 

 Maria PJiillipsii (first found, I believe, in the " Grey Limestone," 

 Inferior Oolite, of Scarborough) claims attention ; but the beautiful 

 gasteropod Pterocera Bentleyi (named after my friend and former 

 fellow worker, Mr. Bentley, of Stamford) seems chiefly to charac- 

 terize these beds at Collyweston. The latter is by no means rare. 



