418 
THE CRETACEOUS ROCKS OF BRITAIN. 
feet. 
Two layers of green-coated nodules, with hard rough nodular 
chalk between ------- -1-1 
Hard nodular white chalk, with layers of white nodules in a 
darker matrix - -- -- - - - 10 
White chalk, hard, but rather less nodular - - - -25 
Nodular white chalk with Inoceramus mytiloides, much 
smoothed by the wash of the sea, but having a bed of 
very nodular chalk at the base - about 38 
Hard white chalk with greenish marly partings and a nodu¬ 
lar bed rather above the middle ----- 22 
About 111 
Professor Barrois records Echinocorys gibbus (a variety of E' 
scutatus ) from the nodular chalk below the dint layer, but neither 
Mr. Rhodes nor Dr. Howe found any Echinocorys in this band. 
If the specimen found by Professor Barrois was really Echinocorys 
and not Holaster it must be a very rare fossil at this horizon. 
Fig. 75. —Sketch-map of Mupe Bay. 
Scale, six inches to a mile. 
In Lulworth Cove the upper part of the Middle Chalk is not 
now accessible, although Professor Barrois seems to have reached 
nearly the whole of it in 1875. The following notes were taken 
by Mr. Hill in 1893: The Terebratulina zone consists of 
somewhat rough chalk in thick beds; this passes down into 
