248 FRANK E. BEDDARD. 



nothing in describing that species of the specialisation of the 

 sacs into two regions. The immense length of the sperm-sacs 

 is only paralleled among the Geoscolicidse ; these organs are 

 not, as a rule, very long in the family Eudrilidae. 



The sperm-ducts are single, one on each side of the body : 

 they leave the dilatation which lies immediately behind the 

 funnel, and pass straight back to the atria ; they communicate 

 with the atria a little before their opening into the terminal 

 bursa. 



The atria are large ; they measure about 36 mm. in length. 

 The greater part of the atrium is a tube of considerable 

 calibre, with thick glandular wall. Internally it is longitu- 

 dinally ridged ; the proximal part of the atrium is much 

 narrower : the two atria join before opening into the median 

 bursa. 



The sperm-duct of each side opens into its atrium someway 

 in front of the external orifice. The atria extend through 

 about sixteen segments. The glandular part is of a tube-like 

 form, but of an irregular contour ; it is partially constricted 

 at intervals ; there is, however, nothing like the regular diver- 

 ticula figured by Michaeisen in P. coer ulcus (1). Figs. 8, 9 

 show the arrangement of the atria in this species. 



The female reproductive system is illustrated in figs. 7, 9; it 

 differs in some respects from that of P. coeruleus. The 

 external orifice of the spermatothecalies, as already mentioned, 

 behind the male pore, on the boundary line between Seg- 

 ments 18 — 19. This aperture communicates with a sac, 

 which immediately divides into two; these pass round on each 

 side of the nerve-cord, and reunite at some distance from the 

 point at which the sac divides : the sac does not embrace the 

 alimentary canal. A wide unpaired sac is thus formed, which 

 is not quite so long as the atria. It is of about the same 

 calibre. The interior of the sac is marked by numerous folds, 

 arranged to form a network. The sac is half an inch in 

 length. 



In dissections of the worm a pair of elongated pouches were 

 always to be seen rising up on either side of the intestine, in 



