[| 
118 Acephala; Elatobranchia. 
Rhomboides, Blainv. 
Corbula, Br. 
nucleus, Lam. (Mya inaequivalvis, Montag.) 
porcina, Lam. 
Coralliophaga, Blainv. 
Clotho, Fauj. 
Fam. 7. Mactracea. (Les Mactracées , Lam, ) 
LiGAMENTIS DUOBUS DIST!NCTI1S, 
Erycina, Lam. 
Mactra, L.; Lam. 
carinata, Lam. 
striatula, L. 
helvacea, Chemn. (M. vlauca, Gm.) 
grandis, Gm. 
stultorum, L. 
maculosa, Lam. 
nitida, Spengl. (M. straminea , Lam. ) 
violacea, Lam. 
zonata, Schroet. (M. fasciata, Lam.) 
turgida, Gm. (M. tumida, Chemn.) 
corallina, L. (M, lactea, Chemn., Lam.) 
pallescens , m, (M. corallina, Chemn. ) 
rotundata, Gm. 
fragilis, Chemn, 
limbata , m. 
solida, L. 
crassatella, Lam. 
Listera, Turt. (Ligula, Leach; Scrobicularia, Schum. 
Arenaria, Mhlfld.; les Lavignons, Cuv.) 
