326 THE GEOLOGIST. 



The pretty small univalves Adeon Vihrayeana and Avellana (Mngi- 

 nellcb) Clementina may frequently be obtained in a very perfect state. 

 Two other species of Avellana are recorded from the ganlt, Avel- 

 lana incrassata, and A, mflata. 



Lign. 37. — Acteon vihrayecma. Lign. 38. —Binginella Clementina. 



The most abundant univalve of the Gault, and which is also one of 

 the eharacteristic shells, is the Natica gaultina, which sometimes also 



Lign. 39. — Natica gaultiana. 



occurs of very large size. Five or six other Naticse are recorded 

 as Gault species abroad, some of which are likely to be found at 



Lign. iO— Solarium deniatiun. 



Folkestone, as I have collected fragments of other species, besides 

 the common N. gaulUna. We have already noticed as being of 



