416 ME. L. EICHAEDSON ON THE INFEEIOE OOLITE [Nov. I907, 



lying the Cotteswold Sands ; in the second as part of the Cotteswold 

 Sands (the ammonites characteristic of the Striatulum-'Beds occurring 

 in hard sandstone-layers interstratified with the Sands) ; and in this 

 exposure at Timsbury Sleight as iron shot marls and * marlstones ' 

 below the Midf ord Sands. More briefly, at Wotton-under-Edge tb e 

 Sands are of ipre-striatulihemeTa.; at 'The Springs,' striatuli, etc. ; and 

 at Timsbury Sleight, ^ost-striatuli — more correctly ^ost-StruckmannL 



Below the Cephalopod-Bed are blue clays ; and, if the shaft had 

 been a few feet deeper, I personally should have expected to see a 

 reduced representative of the ' rock-bed ' or Marlstone of the 

 Middle Lias. 



The Main Hill-Mass. 



Beturning to the main hill-mass, there are no sections between 

 Tunley and English Combe ; but at the latter place are several 

 exposures, of which the principal one is in the steep hillside 

 above the inn, and south of the brook. The strata are greatly 

 disturbed, owing to downward creep. The Upper Coral- Bed can be 

 easily distinguished, and contains Isastrcea and Zeilleria Waltoni. 

 It rests upon a slightly-ironshot, shelly ragstone, which is covered 

 with oysters and much bored ; this contains Acanthothyris sjpinosa, 

 Pteria digitata, Trigonia costata, ' Terebratula globata,' JSerpula sp., 

 and on the upper surface Limaiula gibbosa. The ragstone is 3 inches 

 thick, and rests upon a similar, but more rubbly shelly stone with 

 some pebbles ; this in turn reposes upon the very irregular surface 

 of a massive limestone-bed 3 feet 4 inches thick, shelly in the upper 

 portion and more thinly-bedded in the lower. Then comes another 

 massive bed, having its upper surface literally covered with oysters 

 and 3 feet thick, under which is a ' hollow bed ' with Trichites at 

 the top and numerous pebbles. This last bed seems to be the 

 equivalent of the Maes-Knoll Conglomerate-Bed. If this is so, the 

 deposit to be paralleled with the Dundry Freestone measures 6 feet 

 4 inches, and if we include the 3-inch bed at the top, 6 feet 

 7 inches. Such appears to be the correct sequence. 



The beds which come above the Upper Coral-Bed are seen in a 

 disused quarry on Twerton Hill : — 



(E) Twerton-Hill Quarry, near Bath. 



Thickness in feet inches^ 



I. Bubbly Beds. Whitish, shelly limestone, bored at. the top ; 



Tecten (Syncyclonema) demissus, Tleuromya 



Goldfussi, Tholadomya Mtirchisoni, Litho- 



phagus inclusus, Rhynchonella hampenensis, 



S. Buckm., Terebratula globata, auctt. : seen 2 6 



II. Anabacia- a. Limestone, white, oolitic, top-portion bored 



Limestones. and covered with oysters ; Anabacia com- 



planata 1 4 



b. Limestone, rubbly, oolitic, with a shell-bed 

 6 inches thick containing Ostrea, ' Tere- 

 bratula globata,' and pebbles covered with 



Ostreos and Serpulce 4 



III. Doulting Limestones, massive, coarsely oolitic; Serpula, 

 Stone. Trichites, Ostrea cf. Sowerbyi, Lycett, Tecten 

 sp. (of the P.-vagans group) ; but all of 

 these are rare : seen 4 6- 



