56 ME. L. EICHAEDSON ON THE EHiETIC OF [Feb. I9II, 



more clearly brought out in the section made by William Sanders, 

 and reproduced in the Geological Survey Memoir on the district 

 published in 1876. 1 



Wright's description of the section, published in I860, 2 was 

 closely followed by one drawn up by Moore. 3 Wright's record differs 

 widely from that given later by Bristow & Etheridge, 4 so much so 

 that it is impossible to institute a comparison. These latter do not 

 record a single fossil, and only give details of the Pteria-contorta 

 Shales for a distance of 11 feet 9 inches above the top of the marls. 

 Wright's section is not too easy to understand, but he assigns a 

 thickness of a little over 25 feet to the ' Zone of Avicula contorta.' 



Moore's section, unfortunately, is also of little use, for he gives 

 no details of the deposits between the Lias and the bed which he 

 identified with the Bone-Bed. In his collection at Bath, however, 

 there is a piece of pale yellow limestone, identical as regards lithic 

 structure with the ' Naiadites Beds ' of ' Redland (New Clifton),' 

 Bristol, and containing Darwinxda Uassica (Brodie) and Lycopodites, 

 which bears the legend ' Kinetic Plant-Bed, Uphill.' So the West- 

 bury Beds are represented here ; and certain of the layers, at all 

 events, are quite typical as regards lithic, faunal, and floral 

 characters respectively. 



When I visited the section, by kind permission of the Great 

 Western Eailway Company, I found it very much overgrown ; but 

 near the top of the western bank, between the single-arch bridge 

 which spans the cutting and Bleadon (or Uphill) Station, I was 

 able to note the following details : — 



Railway-Cutting, Uphill. 



Thickness in feet indies, f Placunopsis alpinaWmk- 



ler, Pterin contorta 



(Port].), Cardium cloaci- 



Cardium-cloacinum Limestone. Lime- ") o Q \ num Qu., Chlamys valo- 



stone, hard, dark ) I niensis (Defr.), Proto- 



I cardia rlicetica (Merian), 

 I Isocyprina ewa Idi 

 Shales, black — I (Bornemann). 



fa. Pyritic sandy limestone, Acrodus minimus Ag., 



■with conspicuous green G-yrolepis alberti Ag., 



is tj "R aJ patches 1 SaurichtJiys acuminatus 



15. lione-i>ea<j &> ghale and sandstone . ^g., Hybodus minor Ag., 



layers 3 small quartz-pebbles, Iso- 



lde. Sandstone, hard, grey ... 2 cyprina sp. indet. 



^- 16. Shales, black, laminated ; about 3 



.. -~v^v~n.~^~~~. Non-sequence. 



HI &T J ("Marlstone, hard, yellowish-green 1 



^ J ea- ) Marls and marlstones : according to 



pi jgjjj (_ Bristow & Etheridge, about 37 



S4 [Red Marls 



1 ' Geology of East Somerset, &c' pi. iii facing p. 24. 



2 Q. J. G. 8. vol. xvi (1860) pp. 382-84. ' 3 Ibid. pp. 445-46. 



4 Vert. Sect. Geol. Surv. 1873, Sheet 46, No. 3. 



5 W. H. Wickes, Proc. Geol. Assoc, vol. xvi (1900) p. 422. 



