PLATE 51, 52. 
the hollow of the fossil, which appear to have formed a 
lodgment in the capsule, after the seeds were discharged. 
They adhere firmly to the sides of the cavity, and are 
charvged into ironstone, with the other parts of the spe- 
cimen. 
FIG. 3. 
CONCIIYLTOLITHUS Helicites (pusillus) depres- 
sus laivis iimbilicatus anfractibus terctibus, apertura 
subrotunda. S. p. 
A fossil shell. The original an Helix. Depressed, smooth, 
umblllcated, convex beneath. Volutions round and taper- 
ing ; their number about three. Mouth roundish. 
This minute species was found as already mentioned, in 
the seed-vessel just described. I have not observed it else- 
where. It resembles, in some respects, several of our land 
and fresh water Helices; but does not perfectly agree with 
any one species yet known. 
Fig. 3 represents it magnified. 
END OF THE DESCRIPTIONS, VOL, J, 
