Preliminary Notes on Tasnianian Eartliworms. 47 



Spermathecal pores, two pairs, at the level of the interval 

 between the two inner seta? of each side between segments 

 7 and 8, 8 and 9. 



Accessory copulatory structures. A median ventral patch on 

 segments 17 and 18. Two papillje at the level of the innermost 

 setse joined together by a median ridge in segment 19. 



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



Nephridiopores at the level of the third sette (!) 



Alimentary canal. Gizzard in segment 5. No true calciferous 

 o-lands but vascular swellings in segments 13 and 14. Large 

 intestine commencing in segment 19, but there is no clearl}' 

 marked differentiation between it and the oesophagus in front 

 which is swollen out in each segment. 



Circulatory system. Single dorsal blood-vessel. No con- 

 tinuous supra-intestinal. Hearts in segments 8-13. 



Excretory system. Meganephric. A single large one in each 

 segment with ciliated funnel as usual. 



Reproductive system. Testes not visible, but a pair of well- 

 marked rosettes in segments 10 and 11. 



Prostates small and coiled in segment 18. 



Sperm sacs, racemose, on the anterior walls of segments 10, 11 

 and 12. 



Ovaries in segment 13 into whicli the oviducts open. 



Spermathecse, two pairs, in segments 8 and 9. The diverticu- 

 lum simple and less than half the length of the sac. 



Habitat. King Island, in Bass Straits. 



(c) Perich^ta. 



(1). Perichceta tasmaiiica (Figs. 37, 38, 39). Length in spirit 

 2i - 3-| inches, one eighth inch broad. There is a dark 

 median dorsal line. 



Prostomium dovetailed about one half or one third into the 

 peristomium, which is marked by a median ventral cleft, 



Olitellum distinct and complete, occupying segments 13-17. 



Setse. The first setigerous segment has 8 on each side. Back 

 to the clitellum there are 10 or 11, behind the clitellum vary 

 from 12-14. 



