DU LITTORAL DE CHERBOURG. 247 
CamPYLoniscus * decorus, Bréb. 
parvulus, W. Sm. 
bicostatus, W. Sm. in Roper. 
SURIRELLA lata, W. Sm. 
fastuosa, Ehrb. 
Nirzscuia. spectabilis, W. Sm. 
Sigma, (Kg) W. Sm. 
angularis , W. Sm. 
parvula, W. Sm, 
dubia, Var. constricta, W. Sm. 
SYNEDRA superba, Kg. 
Gallionii, Ehrb. 
tabulata, Kg. 
TRiBLYONELLA marginata, W. Sm. 
angustata, W. Sm. 
punctata, W. Sm. 
RHaPHONEIS gemmifera, Ehrb. 
pretiosa, E 
Coccoxets Grevilli, W. Sm. 
diaphana , W. Sm. 
— Var. cruciata. 
Adriatica, Kg. 
Scutellum, Ehrb. 
ACHNANTHES longipes, Ag. 
subsessilis, Kg. 
salina, Kg. 
NAVICULA dina, (Ehrb.) Kg. 
Var 
» Pee Bréb. 
Smithii, Bréb. 
