抄録
(1) The sexes of G. pectinopterum can not be distinguished externally at any phase of maturity.
(2) Numerous lobules arise from the centrally situated spermatic duct and radiate individually on all sides of the testes. The two sperm ducts are free in the anterior part of the testes and join posteriorly to open out by a common aperture.
(3) The entire testis produces sperms and its posterior part is not sterile.
(4) Cyclic changes in the testes have been described. The spermatogenesis commences in the month of January and progresses slowly during the following months reaching its peak in June and July. It then slows down and ceases by the end of October and November. The testes enter a period of rest during November and December.
(5) The interstitial and the lobule boundary cells are present in the testes but secretory activity or cyclic changes have not been observed in them.
