15 Rissoa parva. Shell height 4.4 mm. Weymouth. Early April 2012.

15 Rissoa parva. Shell height 4.4 mm. Weymouth. Early April 2012.

1: brown lines in grooves between white costae are absent or obscured by debris/growths on this specimen.
2: stony alga, Titanoderma (syn. Lithophyllum).

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