SYNEDRA AFFINIS VAR. PARVA (KUETZ.) V. H.
Valve lanceolate, slender; striæ marginal, shorter than in the type.
Synedra gracilis Kuetz.
Common along the coast.
Pl. [12], Fig. 7.
SYNEDRA AFFINIS VAR. TABULATA (AG.) V. H.
Valve linear-lanceolate; striæ, 11 in 10 µ, very short.
Not common. New Rochelle.
Pl. [12], Fig. 4.