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Transactions. 



any " projections " from the side of the follicles. Sections across the 

 ovotestis of AmpJubola show that ova and spermatozoa are developed in 

 the same follicle. The spermatozoa, however, are confined to one jiortion 

 of wall, while from the rest of the epithelium the ova are formed. They 

 develop at a later period of the year. Spermatozoa are fully developed 

 in November, whereas at this date the ova are still small and not ready 

 to be discharged. 



The common genital duct consists of two di.- tinct regions — (a) glandular, 

 (6) non-glandular. The glandular region (gld), into which the hermaphrodite 

 duct leads, lies in close contact with the posterior ventral portion of the 



Pio (;_ — The genital system unravelled so as to exhibit as mueh as 

 possible ( X 2). The point of entrance of the prostate into the 

 cavity of the penis is indicated by dotted lines, ag, albumen- 

 glanci ; cd, common genital duct ; gld, glantlular portion of 

 common duct; gp, genital pore; hd, hermaphrodite duct; 

 hgl, hermaphrodite gland; pe, jienis ; pr, prostate; sv, seminal 

 vesicle. 



albumen-gland (og). It is a white, mucilaginous, finely coiled tube, all 

 the coils of which I have not attempted to show in the drawing. This 

 tube gradually loses its mucilaginous character and widens to form the com- 

 mencement of the non-glandular portion (cd), w^hich narrows again as it 

 passes forward along the body-wall parallel to, and on the left of, the 

 rectum as a wavy duct of a cream colour. It reaches almost to the base 

 of the right tentacle, narrowing slightly as it does so. It then turns sharply 

 on itself, runs backwards, and after a short distance bends abruptly and 

 becomes much enlarged to form the penis (pe), which is a pyriform organ 

 of a light-cream colour with very muscular walls. 



