32G THE GEOLOGIST. 
The pretty small univalves Adeon Vihrayeana and Avellana (Jlingi- 
)i(:Ua) Clementina may frequently be obtained in a very perfect state. 
Two otlier species of Avellana are recorded from the gault, Avd- 
lujia iiLcmssata, and A. inflata. 
Lign. 37. — Acteon vibrayeann . Lign. 38, — Rinqinella eleinentina. 
The most abundant univalve of the Gault, and which is also one of 
the eharacteristic shells, is the Natica yaultina, which sometimes also 
Lign. 39. — Nittu-a tjitnltiana. 
occurs of very large size. Five or six other Naticte are recorded 
as Gault species abroad, some of which are likely to be found at 
Lign, 40. — Solarium dentatum. 
Folkestone, as I have collected fragments of other species, besides 
the common A'^. ijauUhi.C'. We have ali-eady noticed as being of 
