in the Vicinity of Lyme Regis, Dorset. 27 



Organic Remains contained in the Lias Formation, in the Vicinity 



of Lyme Regis. 



Saurian Animals. 



Ichthyosaurus communis. Plesiosaurus dolichodeirus, 



platyodon. (Geol. Trans, second series^ 



tenuirostris. vol. i.) 



intermedins. 



Fish, 



1. Dapedium politum. (Geol. Trans, second series^ vol. i. PI. VI.) 



2. A longer fish. (Ibid. PI. VII. fig. 1.) 



3. A fi)ssil fishj in whose mouth the teeth are arranged in the same manner 

 as in that of the shark. (Ibid. PI. V. figs. 3. and 4.) 



4. A jaw, apparently that of a fish, differing from the preceding, is repre- 

 sented in the present volume, PL IV. fig. I. 



5. Another jaw, apparently of a fish, is represented in PI. IV. fig. 2. 



6. The head of another fish decidedly different from the preceding has 

 also been found. 



In addition to the above remains of fish, are the radii, and their accompany- 

 ing palates, which I have formerly described (Geol. Trans, second series, vol. i. 

 p. 43, 44. Plates IV. and V.) ; and three species, at least, of the former occur 

 in the lias of Lyme *. 



Crustacea. 



Several specimens of this class have been found; but they generally occur 

 much flattened, and in an obscure state. That represented in PI. IV. fig. 3, is 

 in the cabinet of Miss Philpot of Lyme. 



Testaceous Molluscs. 



Chambered Univalves. 

 Nautilus striatus; — Sowerby'sMine- Ammonites stellaris ; T. 93. 



ral Conchol. Tab. 182. communis ;T.107.figs. 2. 3. 



intermedins ; ibid. T. 125. Discus; T. 12. 



* The class of beings to which these radii belonged must have existed during a very remote 

 geological period, as well as at an epoch comparatively recent : for bones of this description, 

 though belonging obviously to different species, are found in the transition limestone of Dudley 

 (from whence Mr. W. Clayfield possesses a specimen); in the carboniferous limestone at Clifton; 

 in the lias ; the oolite formation ; and the chalk. 



e2 



