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undulatus (Phill). The geodes of the zones of the Upper Lias 
more often enclose light objects, frequently bits of the armature 
of young cephalopods, or fragments of small bivalve shells, 
portions of fish, or of small ammonites, which have been crushed 
between the palatal teeth of predacious fishes, and after due 
suction of the soft parts the hard fragments have been rejected. 
A curious instance in point, as peculiar, is from one of the lias 
beds in Normandy, correlating with those of our present section, 
namely, the Stephanoceras commune Zone. These beds con- 
tain large oblong or ovate concretions, which the peasants name 
“Miches,” from their likeness to the cakes of their country 
bread. These geodes not infrequently enclose small fishes, and 
amongst the contents of their stomachs certain tiny ammonites 
are frequently met with; the species is the young of Harpoceras 
cecilia (Reinicke)—perhaps the young of Harpoc. serpentinum. 
The writer has a similar example from the concretionary course, 
or Fish Bed of the Stephanoceras commune Beds at Chosen 
Hill, but the French species of ammonite referred to were de- 
voured by fishes, and the young ammonites are found inside 
them, with the last whorl or body chamber of their shell often 
exceptionally well preserved, which is a feature much prized 
by the paleontologist. Before quitting the subject, we would 
adduce here—but also as exceptionally abundant in the con- 
cretions at Gretton in the Upper Lias—the little Kuomphalus 
minutus. This small gastropod literally swarms at Gretton. 
We take them to be the young of that species, not many days 
old, especially as they are crowded together in groups, and are 
tiny things. It is probable that the fry was deposited on the 
surfaces of delicate algz, like the membranaceous fronds of the 
genus Ulva, a tender seaweed, which has decomposed and left 
the young Euomphali to vouch for its existence ; because the 
_ young of all the genera of the Turbinide feed on alge. 
GRETTON 
There is a good exposure of the Spinatus Zone in a quarry 
a little distance from the Inn; here we find the Upper Lias 
beds of the Stephanoceras commune reduced to comparatively 
