138 
A 
and other parts ; and south of P unfield in Swanage Bay, 
in slaty clay, like that in the Isle of Wight, and accom- 
panied, although sparingly, with similar shells. The lo- 
calities given for the Cypris in France are Puy-en-Ve- 
lay along with gypsum, under lava and over clay, rest- 
ing upon granite, here it is accompanied by Planorbes 
and Cyclostomae ; the Gypsum quarries of Aix in Pro- 
vence along with Paludinae and Cyrenae ; and near Vichy 
in the department of l’Allier *. 
Although there is a marine animal nearly allied to 
Cypris, and perhaps not positively to be distinguished 
except when recent, yet the occurrence of the fossil be- 
fore us, in a series of localities always in company with 
fresh-water genera, justifies the name which we, as well 
as the French authors, have adopted. 
The same anomaly occurs in the series of fresh-water 
strata (from the top of the Portlandrock to the bottom of 
the green sand) which contains the Cypris that is met with 
above the London clay ; that is, thin layers or beds of 
oysters close to fresh-water shells; and it will probably 
be a long time before this fact is explained. This fresh- 
water formation is an older one than is generally ad- 
mitted, but it is not the oldest ; for the bituminous coal 
series contains strata of fresh- water shells, besides others 
in which are found marine reliquiae. 
* Cuvier & Brongniart, Descript. Geol. des Env. de Paris, pp. 260, 
261, 301. 
