108 
THE GEOLOGIST. 
Isocardia concentrica, oolite. 
-Uma antiquata, yellow lias. 
prohoscidea, common in tlie upper bed of the oolitev 
gibbosa, oolite; this occurs sparingly in the Trigonis 
grit. 
rudis, oolite ; occasionally with the L. proboscidea. 
Melanea striata, oolite. 
Uneatay oolite, Stonesfield slate. 
constrida, oolite. 
These shells appear mostly in the same bed, viz. 
the Gryphite grit. 
costata, Stonesfield slate. The transverse striations 
and longitudinal ribs agree with our shell, not- 
withstanding Sowerby^s figure was from London 
clay. 
My a liter ata {v. scripta), oolite, 
angulifera, marlstone, oolite. 
These shells are differently named on account of 
the different directions of the markings, but this 
I think is accidental. 
gibbosa, lower lias. 
Mytilus pedinatus, inferior oolite of Leckhampton Hill. 
amplus, in the clay above the Stonesfield slate (rare) . 
Modiola bipartita, oolite. 
Hillana, oolite. 
These two shells are found together in the Gry- 
phite grit. 
alaformis, oolite, in a bed superior to the above. It 
has been named Perna mytelloides in Bronn^s 
" Lethoea geognostica.^^ 
minima, lower beds of lias. This small shell is met 
with in great abundance in the upper side of the 
slabs of compact lias, which form the base of the 
liassic beds. 
