﻿210 DK. A. VATJGHAN ON THE PAL^EONIOLOGICAL [May I905. 



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Exposures : — 



„ Q j (1) In the cutting on both sides of Lilliput-Farm 

 Bridge. 

 (2) In the two quarries at the western end of the 

 town, north of the Bristol Road. 

 The first, or easternmost, of the two quarries exhibits the massive 



limestones, with a thick oolite-band at the top. 

 The second affords a splendid section of the mottled-limestone 

 series and of the shales and grits above. 



Eaunal character: — 



Corals: 

 Syringopora cf. distans. ; Cyathophyllum Murchisoni (?) . l 



Lithostrotion Martini & variants. . j Clisiophyllum 9. 



Brachiopods : 



Seminula ficoidea and its allies. 

 Product-us 9 (?). 

 Productus atf. Cora. 



Productus ' giganteus? 

 Ckonetes papilionacea. 



Notes : — 



Ganinia occurs only at the top of S,, as already stated. 

 Lithostrotion Martini starts at the top of S 1? reaches its 



maximum a little above the very top of that horizon, and 



greatly diminishes in numbers afterwards. 

 Syringopora cf. distans is not uncommon throughout the same 



range. 

 Clisiophyllum d occurs in some numbers in the main oolite- 

 band. 

 Cyathophyllum Murchisoni (?) occurs rarely in the concretionary 



series, and in some of the limestone-bands included in the 



thick shales. 

 Seminula ficoidea starts at the very base of S x (that is, in the 



middle of the dolomites) and remains extremely abundant 



right up to the top of the shales. 

 Productus 6 (?) occurs in S x (the specific determination is 



doubtful). Productus aff. Cora (mut.) is common in S a , up 



to the concretionary beds. Productus ' giganteas 1 attains a 



maximum just below the concretionary beds, and is also 



common in them. 

 Ghonetes papilionacea teems at two or three levels between the 



top of Sj and the bottom of the concretionary beds. 



Correlation with the Avon section. — The similarity of 

 f aunal distribution amounts almost to identity ; the only difference 

 seems to be the retardation at Sodbury of the entrance of Litho- 

 strotion, which, there, first appears at the maximum of Ganinia, 

 whereas in the Avon section it enters a few beds below. 



In lithological character, the chief point of difference is the great 

 inflation at Sodbury of the concretionary limestones and of the 

 shales above them. 



1 This is a field-determination. 



