BY J. J. FLETCHER. 1005 



ment with 20 may precede one with 16, or when fewer than 

 20 the setae are evidently at greater intervals, it would seem 

 that 20 per segment is the normal number ; hence differences are 

 probably quite as much to be attributed to wear and tear as to 

 possible variation] ; this number then gives place to 24 (occasionally 

 two or three more, though in this region one may find a segment 

 preceded and followed by one with a greater number) which con- 

 tinues for a number of segments ; finally posteriorly except on just 

 the last few segments the number increases to about 30 or a few 

 more. The body tapers steadily posteriorly and here the dorsal 

 interval devoid of setae may be said to vanish, the interval being 

 not greater than that between two ordinary setse. 



Clitellum comprising segments xiv-xvii, together with xiii 

 partially. 



Accessory copulatory structures comprise (1) the ventral surface 

 of X outwards on each side to beyond the second seta tumid, more 

 or less completely longitudinally divided in the median line, and 

 with four fossettes, an anterior and a posterior pair ; and (2) pairs 

 of papillae on xvi and xvii, the ventral surface of xviil dorsad of 

 the male pores also swollen. 



Dorsal pores after v as in the typical form. 



Ilab.—'M.t. Wilson and Lawson, Blue Mts., N.S.W. 



Va7\ b: — Seventeen specimens 57 (juv.) to 120 mm. long, 

 3-4 mm. broad ; number of segments about 115-140. 



Setae : on the preclitellar segments usually 20 per segment, but 

 the following variations were noted in different specimens : — on 

 segment v, 14 on one side and only 8 on the other; on xiv, 

 14 -f- 14 ; on xv, 14 -f 10 : posteriorly the number may increase to 

 about 40 setae per segment. 



Accessory copulatory structures : the ventral surface of xi 

 swollen for a space extending outwards on each side to about 

 the second seta, with a pair of fossettes, one on eacli side of the 

 median line, in front and ventrad of the first setae, rarely a little 

 further apart; a similar but less completely developed area in 



