34 Rissoa membranacea.

34 Rissoa membranacea.

Usual height in Croatia is 4 to 6 mm, maximum c. 8 mm. Sinuous brown, costal lines on smooth part of body-whorl. Similar bands on some Atlantic specimens and some Rissoa parva (see fig. 43). Height 8 mm. Mediterranean form. Sublittoral. Novigrad, Croatia. November 2017. Leg. © A. Petani.

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