-PHYSIOLOGY OF THE INVERTEBRATA. 451 



The Cephalopoda are dioecious, and the genital organs are 

 unlike those of other Mollusca. " They consist, in both sexes, 

 of lamellar or branched organs, the cellular contents of which 

 are metamorphosed into ova and spermatozoa, and which are 

 attached to one point or line of the wall of a chamber, which 

 communicates with the pallial cavity by two symmetrically 



Fig. 79. 



Male Reproductive Organs of 



Sepia. 



{After Dr. A. voN Mojsisovics.) 



t = testis, p = penis, vd = vas 



deferens. pr = prostate. 



isp = receptacle of spermatophores. 



vs = vesicula seminalis. 



Fig, 80. 

 Female Reproductive Organs 

 OF Sepia. 

 (After Milne-Edwards.) 

 a = anus, ov = ovary, gn = nida- 

 mental glands. ffn' = accessory- 

 glands, od = oviducal gland. 

 od' = oviducal aperture. i = in- 

 testine. 



disposed oviducts, in the females of some species; but in 

 most female and almost all male Oephalopods it has only one 

 duct, the termination of which is situated on the left side, 

 but may be near the middle line (male Nautilus), or even on 

 the right side (female Nautilus)." 



In the male Sepia (Pig. 79) the genital organs consist of a 

 wellrdeveloped testis, a vas deferens, which passes into a 



