About November-December both sexes should have well developed reproductive systems. Most breeding occurs in February to May and the reproductive systems begin to regress after then. During copulation the male inserts the penis into the female gonopore and deposits sperm. The exact site of fertilization is not known but is presumed to be proximad the albumen gland. The eggs are placed in capsules which are attached to the substratum by the pedal gland.
Eggs develop in the capsule and emerge as veligers.
The veligers enter the plankton and then settle to the bottom and begin a sedentary omnivorius existence on a mud flat. Deflect the mantle and look on the right for the large anal papilla with its distal anus . If you have a male, the penis will be on the right side and if you have a female look for the small genital papilla medial and posterior to the anal papilla. The single gill is located on the left floor of the mantle cavity. It is connected to the heart by an efferent vessel.