296 
HUGHES : INGLEBOROUGH. 
east margin of this triangular mass of limestone, a line of broken 
rock which looks very much as if it had broken in over an old 
cave. The Main or Upper Scar Limestone is an exceedingly 
interesting deposit. It is the last limestone of any importance 
in our Carboniferous rocks, for the Crow Limestones of the 
Millstone Grit are thin and impure and of an entirely different 
tjrpe. It consists of a massive, thick-bedded, grey limestone 
resting upon the calcareous platy sandstone which passes down 
into more massive rock. It is full of fossils, especially encrinites, 
which in the upper part, where the rock is disintegrated, fall 
apart, so that instead of picking up pieces of encrinital lime- 
stone we gather handfuls of encrinite stems. Where the rock 
does not crumble the fractured surfaces have a coarsely crystaJline 
appearance, largely owing to the calcite of the encrinites breaking 
along its rhombohedral cleavage and presenting angular pro- 
jections and clear facets. From the grey crystalline limestone 
immediate^ soutli of the highest point of Ingleborougli I have 
collected the follomng fossils : — 
Thamniscus dubius (King), var. carhonarius (Vine). 
Spirifera ovalis (Phill.). 
8. trigonalis (Mart.). 
S. trigonalis (Mart.), var. with smooth medial rib. 
Aihyris planosulcata. 
A. (Seminula) ambigua. 
Rhynchonella [Hypothyris] cordiformis (Sow.). 
Camarophoria crumena (Mart.). 
Producta scabricula. 
P. spinulosa. 
P. semireticulata. 
P. pustulosa ? 
Leptoena rhomboidalis, var. analoga. 
Streptorhynchus [Orthotetes] crenistria (Phill.). 
Dielasma sacculus (Mart.). 
Capulus neritoides. 
Pterinopecten ? 
I have on record that Brachymetopus has been found 
here, but this requires verification. 
