308 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [April 9, 



The Marlstone — The Middle Lias. 



Ft. in. 



H. The upper bed of the Marlstone is a hard, brown, calca- 

 reous sandstone, which forms the capping of the Marl- 

 stone terrace * 12 



h'. The Marlstone is well developed, and consists of fox- 

 coloured sandstone, more or less ferruginous, with grey 

 impure sandy limestone containing oohtic grains : thick- 

 ness 186 



I. The Lower Lias Shales and Limestone : thickness unknown. 



Fossils of the Inferior Oolite — a, b, c. 



A. The Freestone-beds are not fossiliferous : the upper rag- 



stones contain the common species found therein ; but 

 they are not abundant, 



B. Is not sufficiently exposed to be worked for fossils, 

 c. Contains — 



Ammonites corrugatus, Sow. (=:i4m- Ostrsea costata, Sow. 

 monites Murchisonce, Sow.). Serpula socialis, Goldf. 



Fossils of the Cephalopoda-bed — d, e. 

 D contains — 



Ammonites insignis, Schubler. . Belemnites breviformis, Voltz. 



variabilis, d'Orh. compressus, Voltz. 



opalinus. Rein. irregularis, Schl. 



Jurensis, Zieten; only frag- Nautilus inornatus, d'Orb.; frag- 



ments with the rounded back were ments of this species, 

 obtained. 



e. The upper beds contain nearly all the fossils : I saw few in this 

 layer of rock. 



F. The nodules are not so well exposed as in Frocester Hill : some 



fragments of Ammonites and Belemnites only were observed. 



G. The characteristic Upper Lias Ammonites are here found : — 



Ammonites communis. Sow. Ammonites bifrons, Brug. {Walcotii, 

 serpentinus, Schloth. Sow.). 



H contains many well-known Marlstone forms, such as — 



Ammonites margaritatus, Montfort. Pecten aequivalvis. Sow. 

 spinatus, Brug. Gryphsea gigantea. Sow. 



I. The Lower Lias beds were not examined with reference to their 

 palaeontological characters. 



It has been stated by my late lamented friend Mr. H. E. Strick- 

 landf that the bed herein described as the Cephalopoda-bed " is the 

 precise equivalent of the v^ell-known Oolite of Dundry, near Bristol, 

 which may be recognized as far off as Bridport on the Dorset coast," 



* See Hull on the Marlstone Platforms of the Cotteswolds, Quart. Journ. Geol. 

 Soc. vol. xi. p. 485. 

 t Quart. Journ. Geol. Soc. vol. vi. p. 250. 



