160 



THE LIAS AMMONITES. 



No. 18. Hard beds of PisoUtic Oolite, and 



No. 19. Buff-coloured PisoUtic Limestone, forming a kind of transitional lithological 

 condition from the oolitic limestones of the Freestone to the beds of Roestone and Pea- 



grit. 



No. 20. The Eoestone forms the base of the Freestone series. It consists of a 

 whitish limestone, composed of large oolitic grains, and containing a great variety of small 

 Shells, Corals, and Echinoderms, in very fine preservation. In some respects the general 

 fades of the fauna of the Roestone resembles that of the Great Oolite of Minchinhampton. 

 Many of the Mollusca are specifically distinct, and others are identical with those of that 

 formation. The shells are nearly all small, and well preserved. In some the colouring 

 matter of the shell is present, and there are many undescribed species in the series ; many 

 beautiful Alaria, with their long spines, were obtained from this bed at Leckhampton ; 

 and my old friends, the Rev. P. B. Brodie and Dr. Lycett, collected, determined, and 

 published, in 1850, a full list of these remains. I have not worked this bed at Cleeve 

 Hill with much attention, but in a short time I collected many of the species of my 

 friends' list. 



Anthozoa. 



Caryophyllia. 



Thecosmilia. 



Montlivaltia. 



Isastrsea. 



ECHINODERMATA. 



Pseudodiadema depressnm, Ag. 

 Acrosalenia Lycetti, Wright. 



Astarte orbicularis. Sow. 

 — depressa, Miinst. 

 Area pulchra, Sow. 

 Avicnla complicata, Buck. 

 Cardium coguatum, Phil. 

 Cucullaea elongata, Sow. 

 — oblonga, Phil. 

 Corbula curtansata, Phil. 

 Hinnites velatus, Goldf. 

 Psammobia laevigata, Phil. 



Terebratula simplex, B^ick. 



Patella rugosa, Sow. 



— nitida, Deslong. 

 Pileolus Isevis, Sow. 



Stomechinus germinans, Phil. 

 Polycyphus Deslongchampsii, Wr. 



Lamellibeanchiata. 



Gervillia costatula, Deslong. 

 Cypricardia cordiformis, Desh. 

 Limea duplicata. Sow. 

 Lucina despecta, Phil. 

 Mytilus asper. Sow. 

 Nucula variabilis. Sow. 

 Ostrea costata, Sow. 

 Pecten comatus, Mixnst. 



— Dewalquei, Oppel. 

 Trigonia striata, Sow. 



Brachiopoda. 



I Terebratula plicata, Buck. 



Gasteropoda. 



I Natica adducta, Phil. 



I Nerita costata, Sow. 



I Alaria (three new species). 



