498 



PEOCEEDIXGS OF THE GEOLOGICAL SOCIETY. 



Area puUa, Terq^. 



Astarte, sp. 



Cardinia Listeri (C. Eyeni, 



Terq^.). 

 Cardita multicostata ? 

 Pinna folium. 



semistriata, Terq^. 



CucuUsea similis, Terq. 

 Modiola producta, Ter<i. 

 Myacites. 



, sp. 



Nucula, sp. 

 Pholadomya ambigua, 



8ow. 

 Unicardium cardioides. 

 — , sp. 



Cerithium Semele, i)' Orh, 



trinodulosum, Mar- 

 tin. 



CoUenoti, Martin. 



gratum ?, Terq. 



Chemnitzia p olita, Martin . 



Dentalium. 



Littorina clatlirata. 



Melania abbreyiata, Terq^. 



Pleurotomaria Anglica, 

 Bow. 



expansa, BoWi 



trochotoma* 



, sp. 



Trocbiis Piettei, Martin. 



Turbo liassicus?, Martin. 



Turritella Humberti, Mrt. 

 Ammonites angulatus. 



Bucklandi. 



Conybeari. 



Turneri. 



, sp., young, as at Bro- 



castle. 

 Nautilus lineatus, Bow, 



intermedius, Bow. 



Ehyncholites. 

 Geoteutliis, hooks of. 

 Acrodus, teeth of. 

 Hybodus, teeth and spines. 

 Leptolepis. 



Ichthyosaurus, bones of. 

 Plesiosauras, bones of. 



3. Willshridge Section of Lower Lias, BJicetic, and Keuper Forma- 

 tions, and Coal- Measures. — The Mangotsfield Eailway, after passing 

 through, the sections at "Weston just mentioned, continues on the 

 Keuper Marls until it crosses the River Avon, at Saltford, where it 

 again intersects the Ammonites- BucJclandi beds. It then soon turns 

 to the northj and at Willshridge, before it enters the coal-district, 

 reveals the following most interesting combination of rocks of dif- 

 ferent geological eras, within a distance of less than 100 feet : — 



1. Lower Lias. ft. in. 



Series of 25 beds of Lias, with intervening beds of marl, 

 occupying the centre of a small trough containing Lima 

 gigantea, Nautilus, kc. ko 8 10 



2. Bhcetic Beries. 



«, White Lias 5^ 



Ditto 7i 



Ditto 10 



Shale... 3 



WhiteLias 4^ 



Ditto ; 5 



Ditto 2 



Ditto, various rubbly beds, with Area, Axinus, Fteromya,, 



Modiola, and Avicula decussata on the surfaces of the beds 9 

 h. Laminated light-blue clay, with Estheria minuta, CytJiere 



liassica, Avicula decussata, &c 4 



c. Occasional bands of conglomeratic stone, with fish-scales 



&c., occasionally passing into " Landscape-stone " 1 



d. Light-grey conchoidal Marlstone, sometimes passing into 



layers of indurated Marlstone, full of comminuted shells, 

 and often yielding good examples of Cardium Bhcsticum, 

 Pecten Valoniensis, Axinus concentricus, and Cardita^ 

 with plant-like impressions 



e. Blue laminated clay, crowded with Ehaetic shells 



/. Black laminated slaty clay, with numerous large coprolites, 



bones of Plesiosaurus rugosus, fish-scales, teeth, and 



Di&cina Townshendi 



g. Conchoidal light-blue marl 



3. Keuper. 



Variegated red and blue marls, with Sulphate of Strontia 

 passing into regularly bedded New Eed Sandstones, with- 

 out organisms about 25 



4. Coal-Measures. 



Tliickly bedded Pennant rock, deeply coloured bv iron. 



6 



6 



6 







4 







LI 







