64 



MR. L. RICHARDSON ON THE RH^TIC OF [Feb. I9II, 



are well-rolled, and frequently very much bored by a species of 

 Polydora? 



The pebbles are cemented together by a dull-grey matrix, in 

 which occur specimens of Plagiostoma valoniense (Defr.), Dimyodon 

 intiis-striatus (Emmerich), Pterin contorta (Portl.), Chlamys valo- 

 niensis (Defr.), Ostrea Jimbriata Moore (some of which are bored 

 by Polydora), Oardium sp., Cardinia sp., Plicatula (?) hettangiensis 

 Terquem, Pollicipes rhceticus Moore, echinoid radioles, Gyrolepis 

 alberti Ag., fragments of saurian bones, etc. 



It was Charles Moore, however, who described the sections here 

 in greatest detail ; and probably, but for regrettable causes, there 

 would have been yet more detailed information available. 



He gives records of two of the sections at the Hapsford-Mills 

 end of Vallis Vale. The first and southern one of the two was 

 measured at, or near, the northern end of what is called by 

 Mr. McMurtrie Quarry 'A.' 



Section in Vallis Vale. 



Thickness in feet inches. 

 tli basal 



Inferior 

 Oolite. 



f Limestone, 



3 conglomerate containing 



1 Carboniferous Limestone 



v. corals (derived) : seen 



Non-sequence. 

 "Clay with limestone-bands 

 and nodules 



12 



KHiETIC 



(Cotham & 



Westbury 



Beds). 



Conglomerate 



Clay, blue 



■\ Conglomerate 2 



Clay, blue 



C Estheria minuta, var. 



3 brodieana Jones, Ly- 

 j copodites lanceolatus 

 v. (lirodie), insects. 

 C Estheria minuta, var. 



4 < brodieana, Proto- 

 4 (. cardia (?). 

 Fish-scales and teeth. 



Pteria contorta (Portl.), 

 Chlamys valoniensis 

 4J (Defr.), Chiton rhceti- 

 cus Moore, Pollicipes 

 rhceticus Moore, fish- 

 scales. 

 Unconformity. 

 Carboniferous. Limestone : seen about 15 Dip, 35° N.W. 



The foregoing details are derived (but have been checked) from 

 Moore's observations recorded in the Quarterly Journal of this 

 Society for 1861, vol. xvii, p. 497, and in Prof. T. liupert Jones's 

 ' Monograph of the Fossil Estherice' 2 : for Moore sent specimens of 

 Estheria to Prof. Jones for identification and notice in his Mono- 

 graph, along with stratigraphical details. 



Section at Hapsford Mills. — The last section to be noticed 

 in this area is in the quarry which has been partly utilized for a 

 saw-pit, just before turning into the by-lane leading to the Elm 

 road. 



1 F. A. Bather, Geol. Mag. dec. 5, vol. vi (1909) p. 109 ; and ibid. vol. vii 

 (1910) p. 114. 



2 Palasont. Soc. 1862, pp. 73-74. 



