Yol. 6^.~\ OF THE BATH-DOULTING DISTRICT. 401 



Thickness in feet inches. 

 Doulting Beds 11. Limestone-beds, three, with irregular clay- 

 (cont.). partings. The top-portion of the upper- 



most bed is bored, and has a few oysters 

 adhering to it. Acanthothyris spinosa, com- 

 mon, Holectypiis hemisphtsricus (Agassiz), 

 Acrosalenia spinosa, Ag., Glypeus Agassizi 

 (Wright), Cidaris Boucharai, Wr., Tere- 

 h rat ul a globed a, auctt., Trochotoma cerinata, 

 Lycett, Pholadomya Murchisoni (Sow.) ... 2 G 



12. Marl, brown, earthy; no micro-organisms: 



1 to 3 inches 2 



13. Limestone, massive, yellowish, not very fos- 



siiiferous, but contains rarely Lima (Lima- 

 tula) gibbosa, Acanthothyris spinosa, Cidaris 

 Bouckardi, Wright, (fragment probably of), 

 Pseudodiadema depressum ( Agassiz), Clypeus 

 Agassizi (Wright), Terebratula subsphceroid- 



a'lis, Upton (one specimen) 4 



Carboniferous 14. Limestone, highly inclined, with evenly- 

 Limestoxe. planed, riddled, and oyster-strewn surface. 



At first sight, the abundance of Ctenostreon pectiniforme in Bed 1 3 

 might suggest Upper Trigonia-G rit, because in the Cotteswold Hills 

 this fossil is very common at the top of that subdivision ; but the 

 occurrence of Clypeus Agassizi shows that the strata belong to the 

 Doulting Beds. 



Mr. H. B. Woodward remarks that ' fossils, on the whole, are not 

 abundant in the Inferior Oolite of this neighbourhood.' l He obtained 

 Nautilus, Astarte, Ctenostreon pectiniforme, Trigonia, Bliynchonella, 

 and Terebratula maxillata. At one time, I should have entertained 

 some doubt as to the correctness of this last identification ; but 

 recently I found, in the Upper Trigonia-Grit of a quarry near 

 Nailsworth (Gloucestershire), a brachiopod inseparable, in regard 

 to its external morphology, from examples of this species as 

 found at Kemble, only smaller. Additional interest is thus lent 

 to Mr. Woodward's record. 



Vallis Vale and the neighbouring combes are well known, in con- 

 nexion with the sections in them which illustrate so admirably the 

 geological feature defined as an ' unconformity.' 2 The discordance 

 between the horizontal Inferior-Oolite beds and the steeply-dipping 

 Carboniferous Limestone is most marked. The photographs repro- 

 duced here (figs. 2 & 3, pp. 402-403) were very kindly placed at my 

 disposal by Prof. S. H. Reynolds. In the large disused quarry at the 

 Hapsford end of Yallis Vale, the Inferior Oolite, as pointed out by 

 Mr. J. McMurtrie, 3 rests directly upon the Carboniferous Limestone, 



1 'Jurassic Rocks of Britain, &c.' Mem. Greol. Surv. vol. iv (1894) p. 91. 



2 At the cross-roads south of Whatley Church is a large subangular block of 

 grit. Similar blocks have been noticed near Nunney Castle, and have been 

 pronounced to be of Millstone Grit. This one at Whatley certainly looks like 

 a sarsen-stone. See Proc. Geol. Assoc, vol. xi (1890) pp. clxxv-clxxvi. 



3 Proc. Bath Nat. Hist. & Antiq. F.-C. vol. v (1883-85) p. 104; see also 

 C. Moore, Quart. Journ. Greol. Soc. vol. xxiii (1867) p. 490. 



2g2 



