MOLLUSQUES DU ROUSSILLON 
Eh — 
PLANOHE 27. 
Classe GASTROPODA (Cuvier) 
—— 
ORDRE | Prosobranchiata FAMILLES Cerithiadæ, Littorinidæ 
SECTION PB Holostomata GENRES Cerithiopsis, Littorina, Fossarus 
2,  Cerithiopsis tubercularis Montagn, 224 10, 11,12, Cerithiopsis bilineata Hærnes. 2 05 
= var. subulata Wood. 13, 14, 15, 16.17, 18, Littorina neritoides Linné, 242 
= var. obesula ,B, D, D. 19.20,21,  Fossarus costatus Brocchi. 2$2, 
minima Brusina, 297 DPRAGET —  ambiguus Linné. DESED 
Bucquoy, Dautzenberg & Dollfus. 
