Each nephridium of studied animal consisted of a large funnel
which is shaped with nephrostome and a tubular part that
open through nephridiopore into the mantle cavity (Fig.4). It
was found that in L. anatina a pair of gonads are running
along the digestive tract. Male possesses pale whitish testis
while female is having deep yellowish-red ovary at the time
of breeding season preferably during premonsoon