LAMPLUGH : SHELLY MORAINE OF THE SEFSTROM GLACIER. 233 
list given on p. 235, for ^\•hich I am indebted to Prof. De Geer. 
My o\Mi gleaning was made up of the following species (I use 
the older names by Avhich the shells are best knoAm to British 
glacialists) : — Astarte elliptica, Astarte horealis, Mya truncata, 
Pecten islandicus, Tellina calcarea — all of A^hich were very 
plentiful : and I had, besides a large and perfect specimen of 
Cardium groenlandicum (a rather fragile shell), some broken valves 
of Mytilus edulis, a Xatica, and a Buccinum. 
This, it will be noted, is precisely such a list as we should get 
most easily in collecting shells from the East Yorkshire boulder- 
clays, except that Tellimi balthica A\'ould take the place of Tellina 
calcarea (which is very rare in our drifts) and we should be sure 
of including also Cyjmna islandica (which has likewise been 
found on Cora Island, but not by me). 
There is one strong difference, however, in the profusion of 
the coral-like calcareous Lithothamnion which I do not remember 
ever to have seen in our shelly drifts, while on Cora Island it was 
everywhere ; and some of the dead shells of the big pectens had 
been so thickly coated with encrusting growths, that the}' had the 
shape of small birds' nests. 
The seaward front of the moraine is now being steadily 
wasted by the waves, and the clay is carried away in suspension 
while the sheUs and Lithothanmio7i-dehns are swept alongshore 
to the south end of the island where they are cast upon a low 
curving spit, practically uimiixed ^Wth any other material. This 
glaring Avhite beach, shown in PI. XXXV., is at present the best 
collecting-ground in Ice Fiord for shells. First the glacier did 
the dredging ; then the sea did the Avashing and sifting ; and 
now, as may be seen in the picture, the conchologist can do the 
collecting at his ease I 
I have previously mentioned that there are to be found in 
the raised beaches around Ice Fiord certain species of shells 
which no longer live in its waters, and that these are regarded 
as evidence of a somewhat Avarmer climate in comparatively 
recent times. Five such species (classed as " Post-glacial " in 
the appended list, p. 235) are included in Prof. De Geer's collection 
from Cora Island. Their occurrence furnishes another point of 
analogy between the Sefstrom moraine and the British shelly 
drifts wherein there is often an admixture of species that probably 
lived under different conditions of depth and temperature. 
