14 Proceediiujs of the Royal Soc'ietij of Victoria. 



part of the body, distinct from the rest by its ligiiter colour 

 and flattened shape, dorso-ventrally, has 16-Jl) setiB on each 

 side. 



Male pores on slight papillas on segment 18, at the level of 

 the interval between the two inner set?e of each side. 



Female pores on segment 11 anterior to, and ventral of, 

 the level of the two innermost seta?. 



Spermathecal pores, Ave paii-s, between segments 1 and 5, 

 5 and 6, 6 and 7, 7 and 8, 8 and i), difficult to see. 



Accessory copulatory structuies. Segments 17 and 18 have 

 their mid-ventral parts tumid. A special swollen part lies 

 immediately in front of the male opening on each side, and 

 there are tumid ridges ventrall}^ between segments 18 and 

 19, 19 and 20, but these are not strongly marked. 



Dorsal pores present. 



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

 ferous glands, but vascular swellings are present in segments 

 12-15. Large intestine commencing in segment 17. 



Circulatory system. Dorsal vessel single. Hearts in 

 segments 8-1 2, the first two being small. 



Excj-etory system. Meganephric. Each nephridium has 

 a large sac. 



Reproductive .system. Two pairs of testes in segments 10 

 and 11, into which the rosettes open. 



Prostate" coiled, tubular, occupying segments 18-21. 



Sperm sacs, two pairs, one attached to the anterior wall of 

 f5egment 12, the other to the posterior wall of segment 9. 



Ovaries in segment 13, into which ti)e oviducts open. 



Spermathecae, 5 pairs, in segments 5, 6, 7, 8, and 9, each 

 consisting of a sac and diverticulum less than half the length 

 of the former-. 



Habitat. Loch, S. Gip})sland, under logs. 



(12) Perichcda duhia, sp. n. (Figs. 40, 47, 48, 07). Length 

 of spirit specimen If inches, breadth ^ inch. Number 

 of segments, about 100. 



Prostomium completely dovetailed into the peristomium. 



Clitellum extending over segments 13-17 ; lighter colour 

 than the surrounding parts ; not thick and glandular, and 

 scarcely noticeable ventral ly. 



Sette. The first setigerous segment has Q on each side, 

 the 15 following ones have 8; behind this the number varies 

 from 9-12. 



