GERVILLIA. 77 



Oampiche. The specimen figured by Pictet and Ronx is not sufficiently perfect to 

 enable us to state whether it is specifically identical with 0. sublanceolata, but since 

 Pictet, Renevier, and Campiche were acquainted with the type and other specimens 

 of 0. alpina, and had also good specimens from Atherfield, we may feel every 

 confidence in their judgment in this matter. 



-Gervillia sublanceolata (d'Orbigny). Lower Greonsand (Crackers), Atherfield. Sedgwick Museum. 

 Right and left valves of the same specimen, x $. 



A young individual of this species from Atherfield was described and figured 

 by Forbes as Aviculalanceolata. This name, however, had previously been em- 

 ployed by Sowerby (1826) for a species from the Lias, and consequently d'Orbigny 

 altered the name of Forbes' species to Avicula sublanceolata. Goldfuss (183G) had 

 also used the name Gervillia lanceolata for a species from the Middle Jurassic of 

 Wi'irttomberg. Since d'Orbigny's name has priority over Gervillia alpina of Pictel 



