94 PEOCEEDINGS OP THE GEOLOGICAL SOCIETY. [DcC. 6, 



Section at Milton Lane. 



1. Thick blue limestones, compact, containing Zma ^2^rt!nz'e«, feet, inches. 

 L. dwplicata and another species, Hemicardium cardio- 

 ides, Pinna, Myacites, Fecten, Pholadomya, and Wald- 

 heimia perforata (same species as in No. 4), Ammonites 

 Bucklandi, A. Conybeari, 2Lndi Nautilus striatus 5 



2. Clay and bands of indurated rubbly limestone, often no- 

 dular, with many fossils, especially Lima gigantea 6 



3. Thicker beds of sandy limestone, divided by sand, from 

 4 to 8 inches thick ; very fossihferous 4 



4. Sandy limestones and intercalated shale, numerous fos- 

 sils — Lima dupUcata, Lima'}, small Avicula, Trochus 

 (same species as in No. 5), and Waldheimia perforata^ 7 



5. Hard sandy shelly limestone, very fossihferous, with par- 

 ticles of quartz, and shaly partings 2 or 3 inches each, 

 yielding Ammonites (very imperfect) and casts of As- 



\ tarte Sin& Trochus 5 



( 6. White Lias limestone, hard, close-grained, containing the 

 usual fossils, especially Cardium Bhceticum, Modiola 

 Hillana, Lima, and Pecten. I did. not observe Ostrea 



intusst7'iata, nor any corals 7 4 



7. Soft marly shale (base of White Lias), with Modiola mi- 

 nima, M. Hillana, Cardium Bhceticum, Lima, and 



spinj Plicatula 3 



f 8. A peculiar bed, with much quartz, broken and rubbly ... 1 6 

 9. Black shales, with thin layers of selenite in some parts, 

 and frequent traces of peroxide of iron, from 6 inches 

 to ^ inch thick. Contains Cardium Ehceticum and Avi- 

 cula contorta unusually well preserved, and casts of other 

 small bivalves and apparently some minute seed-vessels 

 of some plant. The shells were tolerably abundant, but 

 the genera few 8 



10. Grey marl ; with the exception of traces of small plants, 

 no fossils were observed 2 6 



11. Alternations of clay and marl, rather variable, about 3 or 

 4 inches thick 2 6 



12. Hard grey mai'l, similar to No. 15, becoming harder as it 

 ascends 2 6 



13. Soft green marl and shale 1 4 



14. Series of grey and yellow marls, with layers of marl near 

 the top, where it is more indurated 2 



.3/15. Marly parting 6 



^ L 16. Ked and white marls. 



The Lima-series here amounts to 27 feet, the White Lias to 10 

 feet 4 inches. The Rhaetic (including the grey marls) to 18 feet 6 

 inches. I could see no trace o^ Ammonites planorhis, nor any of the 

 peculiar limestones indicating the " Insect and Saurian" zones, which 

 seem to be entirely wanting, the Lima-beds resting immediately 

 upon the " White Lias." There is certainly a greater thickness of 

 Lias at this spot than might have been at first sight expected, con-, 

 sidering that, as a whole, it thins out towards the Mendips, with, 

 which it here comes into almost immediate contact. The direction 

 of the lane is nearly at right angles to the strike of the beds, which 

 dip about ten degrees, but somewhat irregularly, being much dis- 

 turbed to the north-east. I found one piece of bone-bed lying loose 

 at the lower end of the lane, near the bed IS'o. 14, full of bones, teeth, 



* Most of the shells in nos, 1 & 4 were too imperfect for determination of the 

 species. 



