180 
LAMELLIBRANCHIATA. 
Pholadomyia Phillipsii Ostrea flabelloides 
” deltoidea Pecten lens 
Isocardia mimina Myacites recurva 
Unicardium sulcatum u (?) 
Modiola bipartita Gresslya peregrina 
Gryphea dilatata Goniomyia (?) 
u" bilobata 
GASTEROPODA. 
Natica punctata Pleurotomaria depressa 
BRACHIOPODA. 
Rhynchonella varians Waldheimia obovata 
The plant remains are equally interesting. Scattered 
through the whole rock are innumerable pieces of wood, varying 
in size from small splinters not more than a quarter of an inch 
long, and no thicker than matches, to large masses, in one case 
reaching 18 inches in length and three to four inches in the 
other dimensions. The wood is still in a carbonaceous condi- 
tion. It is true wood. It crumbles under the action of a 
penknife, or eventhethumb-nail. With some small pieces picked 
out with a knife I was able to make rough charcoal sketches. 
This wood is saturated with Carbonate of Lime; on keeping a 
bit of it on a shelf in my dry laboratory, the Ca CO, effloresced 
out in thin plates, splitting the wood into long thin strips in 
doing so. I made numerous endeavours to get sections of this 
wood by rubbing it down, but these were unsuccessful. At 
length, by soaking in dilute hydrochloric acid, then in alcohol, 
turpentine, and paraffin, I was able to cut thin sections with a 
sharp razor (longitudinal and transverse sections were exhibited). 
I have not seen finer wood sections. The dicolytedonous 
character of the tissues is apparent, and a minute examination 
reveals the details of the structure of these tissues. We find 
abundance of fossil wood in the Forest Marble of the Eastern 
Cotteswolds; but I have never met with any which so nearly 
retained its original character—certainly none which cuts so 
readily with the knife. 
Another noteworthy feature of this band of Calcareous 
Sandstone to which I wish to direct your attention, is its 
ee es 
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