48 
this striped band are referred 
to Monograptus Sedgwickii 
Portl., while immediately 
above it Climacograptus sca- 
lar is His., and Diplograptus 
palmeus Barr. occur. 
There are some close- 
textured beds consisting of 
the finest felspathic material 
reset into a porcellaneous 
rock suggestive of the meta- 
morphism of the more sus- 
ceptible volcanic material. 
One mass seems to be a 
dyke, but in the field can 
hardly be distinguished from 
some portions of the rock 
above mentioned. Near the 
base there is a band of 
false bedded sandy mudstone 
which is the only indica- 
tion of proximity to shore 
throughout the series. This 
passes down by the inter- 
calation of bands of shale 
into the Stockdale Shale, 
which here consists of a fine 
sandy shale breaking up into 
finger-like prismatic frag- 
ments. At the base there is 
a gritty calcareous band 
with fossils, and at the top 
there are irregular massive 
blocky mudstones and black 
and grey shales with lenti- 
cular beds of grey fossili- 
ferous limestone, to which I 
have referred as the Spengill 
