1883 XVI. 653/2 When egg-capsules are formed they are often of large size, have tough walls, and in each capsule are several eggs floating in a viscid fluid.
1921 119 A string of egg-capsules containing young examples of Buscyon perversum.
1936 F. S. Russell & C. M. Yonge (ed. 2) ii. 50 Common on the under side of rocks are the egg-capsules of the dog-whelk.