176 NOTES ON THE LIAS IN THE NEIGHBOURHOOD OF EADSTOCK. 



Section at Clanningh Quarnj, Clan Down. 



S 1^ I 4ft. Cream-coloured limestone 



concretions with L. Lias Ammonites. Mr. Moore has already 

 pointed oat (q.j.g.s. xxiii, p. 474) that " the bottom bed of the 

 marlstone " (I should prefer to reject this word for the Eadstock 

 district) '' is conglomerate, and contains A. raricostatus and other 

 shells, which appear to have been removed from the lower zones," 

 an observation which shows how thoroughly this eminent authority 

 is conversant with the beds. His explanation seems to me 

 exceedingly probable, for we notice that the L. Lias Ammonites 

 are generally fragmentary and nearly always imbedded in 

 phosphatic concretions, or consist of the same phosphatic matrix; we 

 imagine all fossils in this condition to have been derived from the 

 clay (h). Some of the phosphatic nodules are well rounded and 

 have evidently been worked up again. Only in one case, viz., 

 in a quarry near Huish Parm, have we noticed in this bed a 

 L. Lias form composed of the yellow oolitic matrix, which is 

 characteristic of the M. Lias here : it was an Am. raricostatus 

 which may perhaps be a legitimate inhabitant of this bed; — if so, 

 it would be another case of the overlapping of Ammonite ranges. 



