NORWEGIAN OPISTHOBRANCHIATE MOLLUSCA 



'17 



and hei'inaphrodite gland, and which opens through a narrow 

 and short canal, leading to the nephroproct situated somewhat 

 in front of the anus-. 



The Genital Organs (fig. 8). 



Goniaeolis shows the singularity that the hermaphrodite 

 gland does not fill the posterior end of the body, but is situated 

 anieriorly in the right and 

 median part of it, well 

 separated from the liver, 

 between its posterior and 

 right main lobes. The 

 gland has a somewhat 

 reniform shape. In the 

 folliculi, the eggs occu- 

 pied the blind ends, and 

 the spermatids were de- 

 veloped beneath them ; 

 both kinds of sexual 

 products seemed to be 

 mature or nearly so. 



From the concave 

 right side of the gonad 

 the hermaphrodite duct 

 takes its origin, and runs 

 describing some irregular windings, forwards and outwards. 

 In its foremost part it is widened to an ampulla-like formation 

 (a); then it narrows again, and bifurcates into the oviduct and 

 the vas deferens. The walls of the hermaphrodite duct are cil- 

 iated, like those of the following oviduct and vas deferens. 



The oviduct debouches rather soon into a wider portion 

 with glandular walls ; in this portion open on one side the mucus 

 gland, which is recognizable by its intensely tinged epithelium 

 when coloured in haematoxylin ; on the frontal side, an albumini- 



Nyt Mag. f. Naturv. LX. 1922. 2 



Fig. 8. Genital organs of G. typica. (cf. p. 46). 



