212 PKOCEEDIIS-GS OE THE GEOLOGICAL SOCIETY. [Apr.^, 



size, one of whicli was of special interest, as it bore the marks of 

 glacial striae, long since noticed by Professor Henslow in the Drift in 

 Norfolk and Suffolk. Large pieces of Lias, the prevailing formation 

 in the neighbourhood, belonging to the Cardinia-bed, were abundant. 



These notes on the Drift over a very small area in the county of 

 Warwick are very imperfect and incomplete ; but it would be impos- 

 sible to go into the subject thoroughly, as it deserves, without a long 

 and careful survey, which I could not undertake ; in the meantime, 

 however, these few remarks may be of service. 



The following list of some of the chief constituents of the drift 

 above described, though by no means complete, will give some idea 

 of its prevailing contents. 



Crystalline limestone, reined, dark-coloured, often black. 



Slaty dark limestone. 



Breccia, some very coarse, forming the ordinary pudding-stone (not com- 

 mon). 



Porphyry, 



Porphyritic greenstone. 



Greenstone and Trap. 



Volcanic grit. 



Hard black grit with much iron. 



Syenite, large square block. 



Hard siliceous grit, varying in colour and mineral composition (abundant). 



Crystalline and schistose slate. 



Pebbles of qviartz, jasper and agate, numerous. 



Pebbles of sandstone of various mineral character, rarely containing fossils. 



Hard and soft chalk (the former predominates), containing Ananchytes, 

 much rolled, Inoceramus, Terebratula, and Sponges in flint. 



G-reensand with Fecten, &c. 



Cornbrash with Avicula echinata. 



Forest-Marble, fossiliferous. 



Light-brown Oolitic limestone, like some of the Lincolnshire Oolites 

 (Grreat Oohte?) with casts of shells — Gervillia, Pinna, Cardium, and 

 NerincBa. 



Lias with Ostrea ( 0. Liassica) and Gri/phcea incurva, much rolled. 



Soft yellow Magnesian limestone containing Area striata, impression 

 of flat valve of Sti'ophalosia Morri^ana, Fenestella rotiformis, casts 

 of Schizodus ?, fragments of Fleurotomaria, interior of a chambered 

 shell like a Kazctilus, and a trace of carbonized woody tissue. For the 

 determination of the above I am indebted to Mr. Woodward. 



Permian Wood, much rolled, frequent. 



Mountain-limestone with characteristic fossils, large Productus, Corals, &c. 



Chert with casts of Encrinital stems, Productus, Orthoceras, and other 

 shells, &c., not uncommon. 



Yellow shelly limestone (probably Carboniferous) containing tmivalves, 

 bivalves, and fish-palate (Deltodus), part of a Dithyrocaris, Millstone 

 grit with Coal-plants. 



Lower Silurian fossils, in pebbles of siliceous sandstone :— 



' Orthis redux, Lingula Lesueuri. 



Spirifer antiquissimus (MS., Salter). 



Bhynchonella, sp. ? 



Modiolopsis, sp. ? (Salter). 



Bivalve undetermined. 



Tr achy derma serrata. 



Trilobite, undetermined, in brown limestone, waterworn {Trimeroce- 

 ^ phalus ?) ; may be Devonian. 



Plants like Fucoids in siliceous sandstone pebbles, probably Lower 

 Silm'ian. 



