Preliminary Notes on Tasmanian Eartliworvis. 49 



(2). P. morcm (Figs. 40, 41, 42). Length in spirits 4 inches. 



Prostoniiura very slightly dovetailed into the peristoniium. 



Clitelluni not marked extei'nally. 



Set*, in front of the clitellum, vary from 11-18 on each side. 

 Within the clitellum there are twenty-one on each side, and the 

 same number is present behind the clitellum. The seta; form a 

 very definite raised ridge round each segment, and the dorsal 

 and ventral break is very small. 



Male pores on papillpe at the level of the interval between 

 the third and fourth setse. 



Oviduct pores on segment 14. 



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

 between the first and second setfe between segments 7 and 8, 

 8 and 9. 



Accessory copulatory structures. Median ventral ridge on 

 segment 18 between the two papilla? ; a pair of elliptical patches 

 at the level of the interval between the first and second setie 

 between segments 19 and 20. 



Dorsal pores present, the first between segments 3 and 4. 

 Nephridiopores at the level of the ninth or tenth seta in the 

 middle of the body. 



Alimentary canal. Gizzard in segment 5. No true calciferous 

 glands present. Large intestine commencing in segment 17. 



Circulatory system. Single doi'sal vessel. Hearts in seg- 

 ments 6 to 12. Supra-intestinal vessel present. 



Excretory system. Meganephric. 



Reproductive system. Testes in segments 10 and 11, into 

 which also open the rosettes. 



Prostates, extending through segments 17-20.. 



Sperm sacs, racemose in segments 9 and 12. 



Ovaries in segment 13 into which open the oviducts. 



Spermathecge, two pairs in segments 8 and 9. The diverti- 

 culum simple. 



Habitat. Lake St. Clair district, Tasmania. 



(o). P. richea (Figs. 43, 44, 45). Length in spirit 3 inches, 

 about ^ inch broad. Dorsal surface (in spirit) purplish 

 colour, ventral flesh coloured. A dark median dorsal line. 



Prostomium about one-half dovetailed into the peristomium. 



E 



