Prelivwiary Notes on Tasviaman EartJnvonns. 53 



(G). P. irregularis (Figs. 52, 53, 54). Length in spirit 

 31 inches, j\ inch broad. The dorsal surface (in spirit) 

 is purplish brown, the ventral is flesh coloured, and the 

 setae form a very distinct ring. 



Prostomium dovetailed about one-half into the peristomiuni. 



Clitellum distinct, complete, occupying segments 13-17 and the 

 anterior portion of segment 18 dorsally. Tumid, and purple 

 colour dorsally, ventrally lighter coloured. Does not hide either 

 the setEe or the dorsal pores. 



Setfe, about 13 on each side in front of the clitellum, 16 on 

 segment 14, 15 on segment 17, 15 in the segments in the middle 

 of the body increasing to 20 on the posterior segments. 



Male pores on papilhe at the level of the interval between the 

 second and third sette on segment 18. 



Oviduct pores on segment 14. 



Spermathecal pores, three pairs. The first between segments 

 6 and 7 at the level of the third seta?, the second between 

 segments 7 and 8 at the level of the fourth setae, the third 

 between segments 8 and 9 at the level of the fifth set;e. 



Accessory copulatory structures, two pairs of elliptical patches 

 at the level of the third setje between segments 18 and 19, 

 19 and 20. 



Dorsal pores present, the first between segments 4 and 5. 



Nephridiopores at the level of the interval between the eighth 

 and ninth seta?. 



Alimentary canal. Gizzard in segment 6. No true calciferous 

 glands, but in segments 14, 15 and 16 the oesophagus is swollen 

 and vascular. Large intestine commencing in segment 17. 



Circulatory system. Dorsal vessel single. The last pair of 

 heai'ts in segment 12. Supra-intestinal vessel in segments 8-12. 



Excretory system. Meganephric. 



Reproductive system. Testes, two pairs, in segments 10 and 

 1 1 , the rosettes opening into the same segments. 



Prostates widely tubular, coiled, extending through segments 

 17-21. 



Ovaries in segment 13, the oviducts opening into the same 

 segment. 



