| OCR Text |
Show 1892.] SPECIES OF EARTHWORMS. 673 are attached to the posterior wall of their respective segments, as they are in Acanthodrilus annectens and in Octochcetus multiporus. The racemose sperm-sacs are in xi., xii. The spermatothecae are elongated pouches in viii. and ix.; they Fig. 2. Octochcetus thomasi, dissected to show the principal organs. 67, gizzard ; B.v, dorsal vessel; B.v, lateral vessel; H, hearts; Sp.s, sperm-sacs; Ca, calciferous gland ; At, atria. appear to have numerous minute diverticula crowded round the duct near to its external opening. The atria do not extend beyond their proper segments. A number of strong muscular bands, such as occur in Octochcetus multiporus, pass from the lateral to the ventral walls of segments, and serve, no |
