MOLLUSQUES "DU ROUSSIEERS 
Planche 34. 
Classe GASTROPODA (Curier) 
a — D UC 
ORDRE I. Prosobranchiata 
SECTION B. Hiolostomata 
FAMILLE : Littorinidæ 
GENRES 
: Rissoina, Rissoa 
12,9 4 Rissoina Bruguieri Payraudeau. 
| e D — — = (juveais) 
6,718 19; = Rissoa auriscalpium Linné. Zz 78 
10, _— _ — var. expansilabris B, DD: 
11, — — — var. fusca B. D. D, 
12, 13, = — — var. acicula Risso. 
14, = — — var. pulchella Risso. 
| < FSN 10, 17; — monodonta Bivorta. 295 
| 18, 19, 20, 21, 22, — violacea Desmarest. 280 
| 
(Il 
| 
Bucquoy, Dautzenberg & Dollfus. 
