162 DESCRIPTION OF SHELLS. 
Notes and Descriptions of New Species, by J. pp C. Sowersy. 
FORAMINIFERA*. 
These mostly microscopic fossils occur in vast numbers in the sandy bed 
which contains the Beloptera. The calcareous rocks that are situated opposite 
Selsey and Bracklesham are composed almost entirely of these minute shells, 
being analogous to the Milliolite limestone of the Paris basin (see p. 13). The 
genera and species are numerous ; a few of the most frequent only are selected 
and named ; two of these appear to be new. 
Alveolina fusiformis. (Tab. IX. fig. 5.) 
Spec. Cuar.—Elongate fusiform, small, length four times its diameter, ex- 
tremities rather pointed ; length 3 or 4 lines. 
A small species, easily distinguished by its form. Occurs abundantly in the 
Beloptera bed. 
Rotalia obscura. (Tab. IX. fig. 6.) 
Spec. Cuar.—Above conical, smooth ; beneath convex, margin obtusely keel- 
formed. Lower surface obscurely granular in the centre, and indistinctly re- 
ticulated. 
Diameter | line, height ? of a line. 
In the same sandy bed as the former. 
Biloculina..... (Tab. IX. fig. 9*.) 
A Biloculina, the species of which is doubtful, as the individuals seem to vary 
and are not well preserved, is represented on the Plate but is not mentioned in 
the List. 
Beloptera bed. 
* The descriptions of Foraminifera ought to have preceded those of the Corals, as they are so 
arranged in the Catalogue, but their real affinities are still unsettled. 
