136 PROCEEDINGS COTTESWOLD CLUB 1903 
in two layers it is almost wholly composed of comminuted 
shell debris. A block found at the base of the cliff was 
four inches thick and crowded with well-preserved Pecten 
valontensts. Ten inches of black shale separate this bed 
from another limestone stratum, which occurs in irregular 
masses, but is continuous throughout the section. The 
intervening deposit according to Strickland and Brodie is 
as much as 18 inches, so that here they are clearly 
separated. Strickland noticed this stratum (bed 5 b), as 
“a second ossiferous bed,” and records “a plicated shell 
resembling a Cardium, and scales and teeth of Gyrolefis 
tenuistriatus, Saurichthys apicalis, Acrodus minimus, and 
Nemacanthus monilifer.’* Numerous impressions con- 
sisting of lengthened wrinkled grooves, about three- 
quarters of an inch wide, and one-eighth of an inch deep, 
were observed by that author on the surface of this bed, 
and described by him as “fucoid.” The ichthyodorulite 
procured from this stratum by Strickland was, in 1881, 
named by Prof. J. W. Davis, Wemacanthus minor.? 
The succeeding deposit of black shales is calcareous 
and imperfectly laminated. It is highly fossiliferous, and 
the same may be said of the equivalent deposits at Coomb 
Hill and Garden Cliff. A horizon is now reached at which 
there is a considerable change, lithologically. There 
appears to have been some mistake relative to the thick- 
ness of this deposit. Strickland gave the approximate 
measurement in his revised section, as 3% feet of black 
shale, and 6 feet of marly clay. I noted 3 feet of black, 
coarsely laminated shales, and 6 feet of similar greenish- 
yellow marly shales, there being no definite line of division. 
Fossils are abundant, especially in the black shales, and it 
is noteworthy that Avecaula contorta has not been procured 
above this horizon (5a), either in this section or in the 
1 Memoirs, p. 168. 
2 Quart. Journ. Geol. Soc., Vol. xxxvii. (1881), p. 419, Pl. xxii., Fig. 5. 
