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main en Laye, &c. in France. This large and handsome fossil, so 
finely displayed in Brander’s work, is remarkable for the size of its 
right lip, which is formed into a wide, round, and rather thin wing, 
extending from the canal at the base, over the body of the shell and a 
great part of the spire. All the superior part of this wing forms, at 
its union with the spire, a longitudinal channel-like fissure. 
A fragment of a fossil shell which I possess, which from its surface 
appears to be from France, resembles the spire, with part of the 
fissure, ot Rostellaria subulata, Lam. ; Strombus fusus, Linn. The 
most common fossil shell of this genus is, Hostellaria Jissurella, 
Lam. ; Strombus Jissurella, Linn. It is very abundant at Grignon. 
The wing is but small ; it however is continued in a channeled ridge, 
over nearly the whole length of the spire. 
Under this genus may be placed Strombus pes pelicani, Linn. Of 
these I possess some from Mr. Strange’s collection, apparently French 
fossils, in a very good state of preservation, and which do not appear 
to differ materially from the recent shells. 
In the Essex cliff, I once met with a shell of this family, but which 
differs from the preceding in having only one spur-like process 
passing out of the alated side. My worthy friend Mr. Francis Crow, 
of Faversham, has, since that, presented me with a similar, but more 
perfect shell, in a silicious state, which he found near that town. 
This shell has been also found in the Devonshire whetstone-pits, in the 
same silicious state ; and it is remarkable that, both in Devonshire and 
at Faversham, these shells are accompanied by a bivalve, Cucullcea 
decussata, a shell which, I believe, has not yet been found in any 
other part of this island ; but which is found in both these places, in 
the same silicious state. A. representation of the Devonshire silicious 
rostellarite, imbedded in its matrix, is given Plate Y. Fig. 11. 
Among the very interesting fossils of the whetstone-pits is the 
minute shell, now entirely flint, represented Plate Y. Fig. 2. This 
shell not only differs from the R. pes pelicani, in its having only one 
