I dissected 1 egg mass of Lineus ruber… 

I dissected 1 egg mass of Lineus ruber today. External case is easy to rip with needles or tweezers. Egg bundles are attached to a sheet which is sticky. It is not so difficult to tear this sheet apart to release the bundles.

Removing the eggs from the bundle membrane is a bit more tricky. Making a small opening and directing the eggs toward the hole gave better results than pulling the membrane in opposite directions (which would compress and damage the eggs).

I dissected several eggs completely and kept a bowl with individual eggs and a another with released egg bundles.