in the Vicinity of Lyme Regis, Dorset. 



29 



Pentacrinites Briareus. 



subangularis. 



Crinoidea. 



Pentacrinites basaltiformis. 



Corals. 

 I have observed casts of this class in the lias of Lyme. 



Vegetable Remains. 



Knotted uncarbonized fossil vs^ood, sometimes traversed by veins of calca- 

 reous spar^ or sulphate of barytes ; — represented in PI. IV. fig-. 6. 



Lignite, generally fiat — (described in Geol. Trans, second series^vol. i.p.45.). 



Plants resembling Ferns ; (Geol. Trans, second series, vol. i. PL VIL 

 figs. 2. and 3.). 



Part of another plant; represented in PI. IV. fig. 7. of this volume. 



Septaria are not uncommon in the lias marls : they frequently contain am- 

 monites in their centre, but are sometimes entirely without organic remains. 



Crystallized minerals are rave in this formation ; iron pyrites, selenite, cal- 

 careous spar, and two or three varieties of sulphate of barytes, nearly com- 

 pleting the list. The pyrites frequently occurs in forms resembling those of 

 mushrooms. 



V. The following list of the beds between the white lias at Culverhole 

 Point, and Axmouth Point, although not relating to the immediate object 

 of the present paper, may be interesting, as it ilhistrates the upper part of the 

 extensive new red-sandstone formation of Devonshire. 



Section of the upper part of the Nsrv Red-Sandstone, near Axmouth Point. 



Thickness. 

 Ft. In. 



Light bliieish-green marl , immediate- 

 ly beneath the lias marl 

 Thin seam of dark grey marl 

 Light-coloured indurated marl* 

 Dark grey marl, with a seam of 



light-coloured indurated marl 

 Light-coloured indurated marl . 

 Dark grey marl . . 



Thickness. 



Ft. 



In. 



} « 







. 







. 



5 



\ ° 



11 



. 



4 



. 



5 



Irregular, indurated, light-coloured ■» 

 marl bed . . . . / 



Dark grey marl, with a light-colour- -» 

 ed seam . . . . / 



Light-coloured indurated marl . 



Dark and light marl, with three thin -» 

 light-coloured beds . . / 



Dark marl 



5 



2 



* This light-coloured bed, and three or four other beds close to it, effervesce in different degrees 

 with acids, and might be termed very earthy limestone. 



