618 OLIGOCHAETA 



from the septa to which they are appended, and their lumen is really part of the 

 lumen of the segment in front of that in which they lie ; hence, the position of the 

 funnels is not perhaps so anomalous as it might at first appear. The spermiducal 

 glands have a distinctly separated muscular duct ; the glandular part of the organ 

 has not a thick muscular sheath. The female reproductive organs are very complex ; 

 the diagram on page 577 may help to make matters clear ; on the dorsal side of the 

 body, and lying above the gut, is a large sac which bifurcates anteriorly, and passes 

 below the gut to reunite on the ventral side of this ; this sac appears to open on to 

 the exterior by the pore on the thirteenth segment ; but. this is not really what 

 happens ; in sections the external pore is seen to lead into a small globular sac from 

 which arises a narrower sac, dilating somewhat at its extremity; this is the true 

 spermatheca, and it lies within the left branch of the large sac surrounding the gut, 

 without communicating with it in any way that I have been able to discover ; the 

 ovaries, lying in the usual position for these organs to occupy, are enclosed each 

 in a sac ; from each sac arises a narrowish tube which puts into communication with 

 the corresponding arm of the peri-oesophageal sac ; the two ovarian sacs also 

 communicate by another narrow tube which passes across the nerve-chord ; also 

 attached to either arm of the peri-oesophageal sac, but apparently not communicating 

 with its lumen, is an egg-sac ; it lies, as usual, on the posterior face of the septum 

 separating segments xiii/xiv. 



Hyperiodrilus africanus, BEDDARD. 

 H. africanus, BEDDARD, Q. J. M. S., vol. xxxii, j 89 1 , p. 236. 



Definition. Length, about 100 mm. No pigment in the skin. Spermiducal glands furnished 

 with muscular duds opening into bursa. llab. Layox awl Bmnarcksburg. W. Africa. 



Genus HELIODRILUS, BEDDARD. 



DEFINITION. Setae paired, those of ventral pairs further apart than dorsal. 

 Clitellum, XIV-XVII. Male pore between XVII/XVIII. Spermathecal pore 

 on XI. Median papillae present on segments comprising clitellum and neigh- 

 bouring segments. Gizzards in XVIII -XXIII; calciferous glands in XIII; 

 pouches in IX- XI. Testes in X, XI, attached to posterior septa, enclosed 

 in separate sacs. No penial setae. Spermatheca large ; its extremity only 

 enclosed in a sac, which is continuous with ovarian sacs. 



This genus agrees in a number of points with the last : MICHAELSEN has, indeed, in 

 his revision of the ' Teleudrilini,' referred the two to one genus ; it differs principally in 



