304 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [April 9> 



Ft. in. 

 lemnites are the dominant forms ; some of the bivalve 

 shells are well preserved, but the matrix adheres to the 

 surface with such tenacity that they can seldom be 

 cleaned without injury. The Ammonites and Nautili, 

 for the most part, want the shell. Rliynchonella cyno- 

 cephala lies in the upper part of the bed, and the Am- 

 monites, Belemnites, Nautili, and other Mollusca in the 

 middle part ; the lower part is not so fossiliferous : this 

 bed measures 4 6 



e. A hard, coarse, brown mudstone, with hard irregular no- 

 dules of a calcareo-siliceous sandstone, highly micaceous 

 and ferruginous, and passing downwards into the sands 9 



/. Fine, brown and yellowish, micaceous sands, passing into 

 dust-colom-ed, grey and slate-coloured, micaceous sands, 

 with inconstant and concretionary bands of highly calca- 

 reous sandstone ; nodules of various size occur in these 

 bands, which are sometimes fossiliferous, containing 

 chiefly Ammonites and Belemnites 150? 



g. Blue clay and shale, marked by the outburst of springs 

 and by pools of water on the terrace formed by the 

 Upper Lias Clay, which is about 80 



h. Marlstone ; a hard calcareous sandstone, resting on brown 

 and grey sands, with bands and nodules of ferruginous 

 sandstone : about 150 



i. The shales of the Middle and Lower Lias, sloping down 

 into the valley. 



Fossils of the Inferior Oolite. 



A. Very few fossils in the Freestone ; those which are observed 



are mostly fragmentary. 



B. The fossils are so fragmentary in this bed that I have not 



been able to determine them. Stems and column-plates 

 of Extracrinus, portions of the tests of Pygaster and 

 Acrosalenia, plates of Cidaris, and quantities of spines 

 in fragments are seen on the slabs, 

 c. The following shells were observed, but could not be ex- 

 tracted from the upper part of the bed : — 



Pholadomya fidicula. Sow. Trichites, sp. ; large fragments only. 



Modiola plicata. Sow. Serpula socialis. Gold/. 



The frond of a Fern was found in this bed by the Rev. P. B. 

 Brodie. The lower part of the rock resting on the Cephalopoda-bed 

 is sparingly fossiliferous. 



In very few localities, where the sands are exposed along the escarp- 

 ments of the Cotteswolds or in the beautiful valleys intersecting 

 these hills, are they found to contain fossils ; at present I only know 

 two localities, Frocester Hill and Nailsworth : the former I have 

 already noticed ; the latter I must now briefly describe, as I shall in- 

 clude the Palaeontology of both localities in my list of species from 

 the Frocester district. 



The fossiliferous vein at Nailsworth is found at the base of the 

 sands 4 or 5 feet above the Upper Lias clay. The bed consists of a 



