D. 
L 
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 MOLLUSQUES DU ROUSSILLON 
Planche 52. 
Classe GASTROPODA (Cuvier) 

és eu - 
ORDRE I. Prosobranchiata FAMILLE: Littorinidæ 
SECTION B. Holostomata GENRES : Riissoa, Barleeia, Truncatella 
LR TP TE EM RRER T2 

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l 
Are 
\ 
NW 
AXY\ 
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NN 
AA bites 

11 Rissoa Guerini Récluz var, sub:ostulata Schwartz 
) , ) 
4, 5; GA Far ru (type) 
6, —  simil.s Scacchi ; 
7, — — — var. decurtata Monts 
8,9,10, —  Lia Monterosato 
11,12, —  parva Da Costa 
13, 14,15, — — var, interrupta 
16, 17, 18, 19, 29, Dolium Nyst 
tit 
21, 22, Barleeia rubra Adams 
23, — _ — var. elongata B. D. D. 
2:, Truncatella subcylindrica Lin (juv.) 
25.27, — — eu 
25, = _ var. sublaevigata Pot. et Mich 
28, _ — var. laevigata Risso (juv.) 
29, — = == == — 
30, 31, 32, _ var. mictulena Bourguignat 
Bucquoy, Dautzenberg & Dollfus. 
