40 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Apr. 6, 



Fossils of A. Upper Trigonia-grit. 



Trichites undulatus, Lye. 

 Homomya gibbosa, Sow. 

 Pholadomya Heraulti, Ag. 



Devalquei, Lye. 



Lama proboscidea, Sow. 



gibbosa, Sow. 



Terebratula emarginata, Sow. 

 Ehynchonella spinosa, Schloth. 

 concinna, Sow. 



Modiola gibbosa, Sow. 

 Pinna cuneata, Phil. 

 Terebratula perovalis, Sow, 



Belemnites canaliculatus, Schloth. 



abbreviates, Miller ? 



Nautilus obesus, Sow. 



lineatus, Sow. 



Ammonites Parkinsoni, Sow. 



Martinsii, oV Orb. 



Moulds of Nerinasa, Pleurotomaria, 



Natica, and Chemnitzia. 

 Trigonia costata, Sow. 



formosa, Lye. 



Fossils of B. GrypMte-grit. 

 Lima proboscidea, Sow. I Pholadomya Heraulti, Ag. 



Gryphsea sublobata, Desk. | Pholadomya fidicula, Sow. 



Fossils of C. Sandy clay. 

 Ammonites lasviusculus, Sow. 

 Pholadomya fidicula, Sow. 

 Gervillia Hartmanni, Goldf. 

 Modiola plicata, Sow. 



The fossils contained in the Lower Trigonia-grit (C 2) and the 

 Chemnitzia-grit (D) of Ravensgate Hill are so much better preserved 

 than the shells from the same beds at Leckhampton, that I shall 

 give the lists of these beds when I describe the Ravensgate section, 

 the species being identical in both localities. 



Section II. — Ravensgate Hill. 

 The Upper Trigonia-grit and nearly the whole of the Gryphite- 

 grit have been denuded from the upper part of Ravensgate Hill, 

 which is capped by about 18 inches of light-coloured rubbly oolite, 

 consisting of brashy layers of an oolitic mudstone, loosely cemented 

 by an argillaceous matrix, and containing a few valves of Oryplicea 

 sublobata. This is underlain by ragstone 1 foot thick, resting on a 

 band of yellowish clay measuring from 12 to 18 inches. 



B. Rubbly oolite above, ragstone in the middle, and yel- ft. in. 



low clay below. The entire bed, which represents 



the lower portion of the Gryphite-grit, is about . . 4 



C. Lower Trigonia-grit. — A fine-grained sandy oolite, 



freely speckled with ferruginous grains of the sili- 

 cate of iron. It is a very fossiliferous bed ; and the 

 numerous shells which it contains are sometimes 

 well preserved. It measures 3 



D. Chemnitzia-grit. — Consisting of 



1. A hard, close-grained, oolitic ragstone, which be- 



comes flaggy in parts, and is apparently non- 

 fossiliferous. From 1 foot to 1 6 



2. A light- coloured marl, extremely friable, and con- 



taining Fishes' teeth, palates, and Chemnitzia. 



From 1 foot to 1 6 



3. Yellowish or brownish clay, streaked with ferru- 



ginous laminae towards the base, and containing 



Fishes' teeth. 1 foot to 1 6 



Oolitic freestones, inlarge bedded blocks, with vertical joints. 



