Illustration of the various stages of spermatophore acquisition and transfer in Pseudohaliotrema virgata Lim, 2002. (a)Spermatophore transfer tube still within the vaginal pouch; (b) evagination of the spermatophore transfer tube; (c) procurement of the spermatophore, spermatophore transfer tube inserted into the spermatophore transfer tube; (e) acquisition of the spermatophore into the vginal pouch by the invaginating spermatophore transfer tube - Lim, S.L.H. (2002)