KEUPER, OR HALLSTADT BEDS. 
G9 
Bleiberg lias been specially noted by the Austrian palaeontolo¬ 
gists. The black slate is almost exclusively occupied by these 
two shells. 
And this fact is doubly interesting when we find that in 
the remote Himalayas the same two species are the charac¬ 
teristic shells of the blackish limestone. Halobia Lommeli also 
occurs in limestone in the Salzkammergut country, forty 
miles from Carintliia. In some localities Mo not is salinaria, as 
above stated, takes its place. 
PECTEN SCUTELLA.—//o rnes? 
Plate 9, fig. 3. 
Hauer, in Denksclirift, vol. ix., plate 2, fig. 23. 
The ears of our species are more equal; else I do not see 
why it may not be identified. Ours has fine concentric lines of 
growth, and very faint radiating lines diverging from the cen¬ 
tral portion in the curved form so common in Jurassic Pectens. 
It is perhaps distinct, being a little too oval, but it may be 
at present regarded as a variety. 
PECTEN.-^. 
Plate 9, fig. 4. 
A very pretty, small species, which I dare not name. But 
I see none in the works above quoted that could be accurately 
referred to it. 
LIBIA. 
Plate 9, fig. 5. 
Half an inch long, and 3| lines broad, regularly convex, 
and especially so at the beak, and not flattened or hollowed 
out on either side. The surface regularly radiated bjr about 
26- flat ribs scarcely raised above the smooth surface, and only 
divided by impressed lines. Lines of growth inconspicuous. 
