774 



ZOOLOGY 



SECT. 



the sperms are rolled up by the action of a system of grooves and 

 ridges into long narrow bundles of about 2 cm. in length, each 

 of which becomes enclosed by a chitinoid capsule of a narrow 

 cylindrical shape, forming a spermatophorc (Fig. 673,^); at one 

 end of the spormatophore is a complicated apparatus of the nature 

 of a spring for causing the rupture of the wall and the discharge 

 of the sperms. The vesicula seminalis expands into a wide sac- 



o-v 



PIG. 1171. Sepia officinalis, diagram of a median vertical section of a female specimen, to 

 j-lmw the relations of the cavities. n/>. aperture between the secondary body -cavity (peri- 

 rardium) and the lateral nephridial sac ; In: ht. branchial heart ; inf. funnel ; inl: s. ink-sac ; 

 int. intestine; Int. *. lateral nephridial sac; li<: liver; med. s. median nephridial sac; or. 

 ovary ; ov. i>. aperture leading from oviduct to secondary body-cavity ; pane, pancreatic 

 app'-ndax'cs ; ."It. shell ; */. stnniach ; id: ureter ; rent, ventricle. (FromVogt and Jung, after 

 Grobben.) 



the spermatopJioral sac or Needham's sac (Fig. 672, sp. s.) in the 

 interior of which the spermatophores are stored. This opens into 

 the mantle-cavity by the aperture already described at the 

 extremity of the penis to the left of the middle line. 



In the female the ovary (Fig. 658, 01?.) occupies a position exactly 

 corresponding to that of the testis in the male, and is enclosed in 

 a similar capsule, with the cavity of which the lumen of the 

 oviduct is continuous. An axial swelling bears numerous follicles, 



