179 

 Fig. V. Section of Leckhampton Hill, near Cheltenham. 



1. Upper Trigonia bed. 



2. Gryphsea grit. 



3. Lower Trigonia bed. 



4. Upper Flaggy Freestone. 



5. Fimbria bed. 



6. Lower thick-bedded Freestone. 



8. D. Liias Sands, vnih Ammonites 



opalinus. 



9. E,F,G. Upper Lias Sands and 



Upper Lias Clay. 

 10. H. Marlstone, vfith. Ammcniites 

 spinatus. 



7. A,B,C. Pea Grit and Ferruginous 11. I. Middle Lias Clay, with 

 OoUte. Ammonites capricornus. 



Leckhampton Hill, near Cheltenham, exhibits one of the 

 best sections of the Inferior Oolite in Gloucestershire, and 

 the following beds are well exposed and may be advantageously 

 studied in that locality : — 



No. 1. — Upper Trigonia Grit, consisting of thin-bedded brown 

 oolitic ragstone, containing many fossils, chiefly as moulds 

 and impressions of Trigonia costata, T. formosa, T. signata, 

 Bhynchonella spinosa, R. globata, Ammonites Parhinsoni, Amm. 

 Martinsii, Clypeus Plotii. 



No. 2. — Gryphffia Grit is composed almost entirely of the 

 valves of Gryphoea suhlohata, imbedded in a fine hard calcareo- 

 siliceous matrix. This ancient oyster-bank is found in many 

 localities in the northern Cotteswolds, but is absent south of 

 Eodborough Hill. Besides its dominant shell it contains 

 Pholadomya Heraulti, Terehratula Meriani, Gervillia tortuosa, and 

 Hyhoclypus caudatus. 



