I 



I 



1856.] WRIGHT UPPER LTAS SANDS. 311 



The Fuller's Earth rests upon the sands. I found no Ammonites 

 belonging to the Cephalopoda-bed at Watton Hill ; but its western 

 escarpment exhibits an interesting coast-section of the three beds 

 in situ ; the united thickness of the Sands, Fuller's Earth, and Forest 

 Marble is here about 400 feet. 



To the east of Bridport Harbour, there is a magnificent coast- 

 section of the Liassic Sands, which there attain a thickness of pro- 

 bably 200 feet : and between Bridport Harbour and Burton Brad- 

 stock there are several good quarry-sections which exhibit the upper 

 ragstones of the Inferior Oolite resting on the Cephalopoda-bed. 

 These two rocks lithologically resemble each other very much ; and, 

 but for their palseontological characters, it would be almost impossible 

 to separate them ; fortunately the Inferior Oolite ragstones contain 

 many Ammonites and other well-known Inferior Oolite Shells, Echi- 

 noderms, and Corals, and by them the line of separation can alone 

 be traced. 



The Inferior Oolite beds contain — 



Cephalopoda. 



Ammonites Parkinsoni, Sow. Ammonites Gervillii, Sow. 



dimorphus, d'Orb. Humpliriesianus, Sow. 



Martinsii?, d'Orb. Brongniarti, Sow. 



subradiatus. Sow. Brocchii, Sow. 



Gasteropoda, 



Pleurotomaria Proteus, Deslong. Pleurotomaria punctata. Sow. 

 elongata. Sow. ornata, Def ranee. 



Conchifera. 



Lima notata, Miinst. Trigonia costata. Sow. 



semicircularis, Goldf. striata. Sow. 



Astarte modiolaris, LamJc. Opis trigonalis. Sow. 



Brachiopoda. 



Terebratula sphaeroidalis. Sow. Rhynchonella plicatella, -Sow. 

 Philhpsii, Morris. senticosa. Von Buck. 



Echinoderma ta . 



CoUyrites ringens, Agass. Holectjrpus hemisphsericus, Desor. 



bicordatus, Desor. Echinus bigranularis, Lamk. 



Clypeus altus, M'Coy. Cidaris Bouchardii, Wright. 



Anthozoa. 



Montlivaltia trochoides, Edw. 8f Haime. 



The Cephalopoda-bed contains 



Ammonites Dorsetensis, Wright. Belemnites breviformis, Voltz. 

 variabilis, d'Orb. Nautilus inornatus, d'Orb. 



Echinodermata. 

 Ophioderma Egertoni, Broderip. 



At Chideock Hill, three miles west of Bridport, the Inferior OoHte, 



