396 NOTES ON AUSTRALIAN EARTHWORMS, 



First two or three segments without annulations, after which as 

 far back as the girdle they may be triannulate ; behind the girdle 

 the segments are narrower and are tri- or they may be quadii- 

 anmilate. 



Setae of the usual character, about "35 mm. long, inconspicuous 

 on the dorsal region making it difficult to count them ; somewhat 

 less numerous on the anterior segments, apparently from 30 to 40 

 per segment ; a well-defined ventral interval devoid of them, about 

 thrice the width of the interval between two setse ; the dorsal 

 interval very irregular owing to its bounding rows of setae not 

 being straight, and to the gaps in the rows of setse in this region. 



Clitellum in the largest specimen comprising segments xiv-xvil 

 together with the posterior half of xiii except on ventral surface ; 

 complete all round ; indicated in the others only by the darker 

 colour of these segments. 



Male pores on xviii, about in line with the interval between 

 third and fourth rows of setae on each side ; pores of oviducts two, 

 close together, about 1 mm. apart on xiv ; three pairs of sperma- 

 thecal pores, lateral, about in line with 6th row of setse, between 

 VI and VII, vii and viii, viii and ix. 



Accessory copulatory structures well developed ; a pair of 

 circular or elliptical papillae at the junction of xvi and xvii, closer 

 together than those further back, in line with the interval between 

 first and second rows of setae on each side ; a second and third 

 pairs at the junctions of xviii with the preceding and succeeding 

 segments, one immediately in front of, and the other immediately 

 behind, and in line with the male pores ; five additional pairs 

 of small elliptical elevations similarly situated at the junctions 

 of the following five segments ; in the specimens without girdles 

 either only the anterior ones, or moi'e or fewer of them are only 

 faintly indicated. 



Alimentary canal : the muscular pharynx occupies about the 

 first four segments ; a very short oesophagus and the large gizzard 

 are in v, the latter displacing the two mesenteries behind it and in 



