46 Proceedings of the Royal Society of Victot'ia. 



Nephridiopores. A pore is present immediately in front of 

 each seta, so that from the second segment backwards there are 

 eight nephridiopores in each segment, though occasionally one or 

 more on each side may not be visible. In the clitellar region 

 apparently there may be more than eight in each segment. 



Alimentary canal. Gizzard in segment 5. No true calci- 

 ferous glands, but vascular swellings are present in segments 9-16. 

 Large intestine commencing in segment 19. 



Circulatory system. Single dorsal vessel. Hearts in segments 

 ■8-13, through which also runs a supra-intestinal vessel. 



Excretory system. Some four meganephridia (?) in each seg- 

 ment but no funnels visible. Behind the clitellar region sac-like 

 structures lie dorsally and tufts of coiled tubes in two or three 

 rows lie ventral of them and corres^Dond apparently in position 

 to the nephridiopores externally. 



Reproductive system. Testes in segments 10 and 11 into 

 which also the rosettes open. 



Prostates, small, flattened, and slightly racemose, in segment 18. 



Sperm sacs, racemose in segments 11 and 12 attached to the 

 anterior walls. 



Ovaries in segment 13 into which the oviducts open. 



Spermathecffi, two pairs, in segments 8 and 9. Diverticulum 

 simple and small compared with the sac. 



Habitat. Emu Bay and Launceston, Tasmania. This form 

 is associated specifically with the name of Mr. A. Simson, of 

 Launceston, to whose kindness I am indebted for specimens of 

 Tasmanian forms. 



(2). M. ljassa?iHS (Figs. 34, 35, 36). Length in spirit 3^ inches, 

 slightly more than \ inch broad. 



Prostomium not at all dovetailed into the peristomiuu). 



Clitellum distinct and saddle-shaped, extending over segments 

 14-19. The whole of the anterior part of segment 14 is 

 included, but except here the tumid portion extends as far 

 ventrally on each side as half-way between the two inner seta;. 



Setse in four couples, the outer couple on each side twice as far 

 apart as the inner. 



Male pores on papillse on segment 18 at the the level of the 

 innermost setse. Oviduct pores on segment 14 within the tumid 

 part of the clitellum. 



