724 



ZOOLOGY 



SECT. 



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. 621, 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, each 

 containing a single ovum at various stages of development, and sup- 

 ported on a long slender stalk. At the breeding season the ovary 

 becomes a compact mass of ova, which assume a polygonal shape 

 owing to mutual pressure. The oviduct (ovid) is a wide tube, opening, 

 as already described, into the mantle-cavity to the left of the rectum. 



6e 



FIG. 635. Sepia, reproductive organs of male. ,r,i. penis; pr. prostate; sp. s. sperm-sac 



resicula si 



te. testis ; v. dcf. vas deferens ; 



seminalis. (After Keferstein.) 



Near its external opening are situated a pair of small accessory 

 glands (ac. nid). Occupying a conspicuous position on the anterior 

 wall of the mantle-cavity of the female is a pair of large flattened 

 glands, of somewhat oval outline, the nidamental glands (nid), 

 situated to the right and left of the ink duct. In the long axis of 

 each is a median canal, on either side of which is a range of 

 closely-set delicate lamellae ; the median canal opens into the 

 mantle-cavity by a slit bounded by a number of plaits situated at 

 the narrower oral end. The nidamental glands secrete the viscid 





