TRIASSIC STRATA XEAR SIDMOUTH. 277 



These were brought to light at different periods during my month's 

 stay. It may be mentioned that those described by Prof. Seeley are 

 merely the bones which I considered capable of identification ; for I 

 met with a great number of small fragments dispersed throughout 

 a particular series of beds situated about 10 feet from the top of 

 the Sandstone. These bones were mostly found in fallen blocks 

 which were derived from these beds in a little cove known as Picket- 

 Rock Cove. It may be well termed an ossiferous zone, as it does not 

 consist of one single bed, but of from one to four ; not that I mean 

 to imply that bones are only found in this zone, since Mr. Whitaker's 

 Hyperodaptdon was found at the very bottom of the Sandstone. This 

 zone is characterized by lithological differences, inasmuch as the 

 matrix is composed of much coarser sandstone, containing here and 

 there masses of marl varying in size from that of a pea to that of 

 a hen's egg. It is nearly hard enough in some places for building- 

 purposes. In these beds ripple-marks are very plentiful. The 

 fragments of bone which are found in this zone seem to be very 

 slightly waterworn. 



I cannot conclude without expressing my thanks to Messrs. H. B. 

 Woodward, W, A. E. Ussher, and W. Whitaker for the kind assist- 

 ance they have afforded me, and to Mr. P. 0. Hutchinson, of Sid- 

 mouth, for the artistic diagrams with which he has furnished me. 



P.S. — Since writing the above I have received from the Pev. S. H. 

 Cook some fragments of bone obtained by him about twenty years 

 ago from the same zone west of Sidmouth, as well as one which he 

 recently obtained from the small outcrop of sandstone with the os- 

 siferous zone on the western side of the Chit-rock fault. 



Below the ordinary red sand on the beach one finds a stratum of 

 black sand which has been derived from the sandstone, but is of 

 greater specific gravity than the red sand, which accounts for its 

 position on the beach. Mr. P. W. Cheadle has kindly made a quali- 

 tative analysis for me, with the following rough results — Silica, 

 magnetic iron oxide, manganese, titanium, and alumina. 



[For the Discussion on this paper see p. 283,] 



