A Cephalopodous Mo Husk. 75 



from which a tube, the spermatophoric sac, passes anteriorly 

 to open through the penis. The latter is a tube of consider- 

 able size, lying parallel to, and along the left side of, the 

 rectum. The penis finally opens at a point about even with 

 the anus. 



There extends from the spermatophoric sac, which is 

 often filled with numerous small worm-like spermatophores, 

 to the capsule of the testis, an elongated and much convo- 

 luted tube, the vas deferens. It is, in places, considerably 

 swollen and highly glandular. 



Make a drawing of the male sexual organs, naming the 

 parts. 



The Reproductive System of the Female. If the 



mantle cavity of a female specimen is opened in the mid- 

 ventral line, the sex may be at once determined by the 

 presence of two large nidamental glands, each about the 

 size of one's little finger and lying side by side along 

 the median line, well towards the anterior of the mantle 

 cavity. Each gland has an anterior opening through which 

 the gelatinous substance of the egg-capsule is extruded. 

 Lying in front of the nidamental glands are the smaller, 

 reniforrn accessory glands, which rest laterally upon the sides 

 of the rectum and ink-bag. 



The large funnel-shaped opening of the oviduct will be 

 seen at the left, on a line with the openings from the nida- 

 mental and accessory glands. Pass a probe into the ovidu- 

 cal opening, and trace the duct below the left gill into the 

 large oviducal gland. It is situated on the left of the pos- 

 terior end of the nidamental gland. From the central point 

 of the oviducal gland the more constricted oviduct will be 

 seen. It passes posteriorly towards the mid-ventral line. 



