Same three capsules as on image 30. Laid 10th April, and reared, at c. 12ºC. Top row: 1 day old; inset shows four-cell cleavage of ova. Ova fill about half of egg capsule. Bottom row: 7 days old; inset shows polygonal outlines of ova after mutiple-cell cleavage. Ova have increased in size and spread to fill almost the whole capsule. Egg capsules laid on a Zostera leaf in captivity by specimens from ELWS, Orkney, Scotland. April 2018. Leg. I. Williamson.
30.3 Rissoa membranacea.
