246 FRANK E. BEDDARD. 



and bears the spermatothecal orifice; the other runs along 

 the middle line of the body, at right angles to the former. 

 Four sucker-like depressions are thus formed, which are most 

 marked in a specimen in which the muscular sac at the male" 

 pore is partially everted. They probably serve as accessory 

 organs of copulation. The oviducal pores are paired, and lie 

 upon Segment 14; they are placed at about the middle of the 

 segment, and are more ventral in position than are the 

 nephridiopores. 



§ Internal Anatomy. 



The pharynx terminates at the end of the 4th segment, and 

 is immediately followed by the gizzard, which lies in Segment 

 5. The oesophagus is furnished with three median, ventral, 

 glandular diverticula — the " Chylustaschen '^ of Michaelsen. 

 These are nearly spherical bodies of a reddish colour, and lie 

 in Segments 9, 10, and 11. In Segment 13 are a pair of tri- 

 lobed calciferous glands. The intestine commences in Seg- 

 ment 14. The alimentary tract is, therefore, in all respects 

 like that of Polytoreut us coeruleus. 



The dorsal blood-vessel is single, and communicates in some 

 of the anterior segments with the ventral vessel by a series of 

 hearts; those of Segments 10 and 11 are especially enlarged. 



Some of the anterior intersegmental septa are thickened, 

 those between Segments 5 — 11 particularly so. There is one 

 septum in front of the first of these ; the septum between Seg- 

 ments 11 — 13, though more delicate than those which come 

 before, is stouter than those which follow. The thickened 

 septa are cup-shaped, the concavity being forwards. 



The nephridia are paired organs. 



The reproductive organs are very remarkable. They are on 

 the whole similar to those of the other species, but difi'er in 

 detail ; these difi'erences are quite sufiicient to distinguish the 

 two East African species. 



The testes I could not discover ; they probably lie within 

 the sperm-sacs, which have, as in Polytoreutus coeruleus, 

 a very remarkable configuration. Attached to the septum 

 dividing Segments 11 — 12 there is on each side of the intes- 



