4. THE LARVAE
107
the vasa deferentia takes place in stages; first, the posterior flexure
develops (Fig. 39) and then the lateral pocket on this flexure appears.
The anterior flexure then develops followed by the coiling of the V ~ S
FIU. 39. Development of the male reproductive system of EUphcZU8icZ superba. A, early
stage; B, mature stage; afl, anterior flexure; ega, external genital aperture; ej,
ejaculatory duct; g, gut; lp, lateral pocket; pfl, posterior flexure ; sps, spermatophore sac ; t , testicular vesicles; vd, was deferens. (After Bargmann, 1937.)
deferens near the posterior flexure (Fig. 39). The coiling extends
gradually throughout the whole length of the vasa deferentia between
the anterior and posterior flexures. Simultaneously, the walls of the
system thicken especially in the region of the lateral pockets. After
107
the vasa deferentia takes place in stages; first, the posterior flexure
develops (Fig. 39) and then the lateral pocket on this flexure appears.
The anterior flexure then develops followed by the coiling of the V ~ S
FIU. 39. Development of the male reproductive system of EUphcZU8icZ superba. A, early
stage; B, mature stage; afl, anterior flexure; ega, external genital aperture; ej,
ejaculatory duct; g, gut; lp, lateral pocket; pfl, posterior flexure ; sps, spermatophore sac ; t , testicular vesicles; vd, was deferens. (After Bargmann, 1937.)
deferens near the posterior flexure (Fig. 39). The coiling extends
gradually throughout the whole length of the vasa deferentia between
the anterior and posterior flexures. Simultaneously, the walls of the
system thicken especially in the region of the lateral pockets. After