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 spermatophore (Fig. 673, B) ; at one 

 end of the spermatophore 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 



inf 



FIG. 671. Sepia officinalis, diagram of a median vertical section of a female specimen, to 

 show the relations of the cavities, np. aperture between the secondary body-cavity (peri- 

 cardium) and the lateral nephridial sac ; br. lit. branchial heart ; inf. funnel ; int. s. ink-sac ; 

 int. intestine; lat. s. lateral nephridial sac; Mr. liver; mcd. s. median nephridial sac; o<: 

 ovary ; or. ap. aperture leading from oviduct to secondary body-cavity ; pane, pancreatic 



(From Vogt and Jung, after 



sh. shell ; st. stomach ; ur. ureter ; rent, ventricle. 



the sperm atopkoral sac or Ncedham'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, ov.) 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, 



