Helisoma anceps lays eggs in gelatinous translucent clusters.
This cluster is taken shortly after eggs laying. I think it is about the second or the third day. There are seen five small dot-like embryos:
Another cluster of eggs contains six more developed embryos:
This is yet another cluster of nine eggs shortly before hatching. Eight hours later all snail were hatched. The length of this whole cluster is 4 mm and it is attached to a stem of a common freshwater plant from the genus Hydrocotyle. There are seen shells of all nine embryos and there are seen heads with eyes of three snails in the first row:
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