BY J. J. FLETCHER, M.A., B.SC. 571 



is partly on the last clitellar segment but involves the preceding 

 segment, and just behind it is a little ridge carrying the seta? of 

 the segment. The second is on the first post-clitellar segment 

 (xviii), carries a pair of pores and the male pores, and extends 

 rather far back so that it partially involves the anterior portion 

 of xix. The last is on the junction of xix and xx and involves 

 both ; or if there is a fourth it is on the junction of xx and xxi. 

 One specimen had only the two anterior pairs of pores. Sometimes 

 the portion representing the handle of the dumb-bell is wanting, 

 and then the pores are situated in elliptical depressions or pits, 

 which are a little longer (transversely) than the intervals between 

 the inner rows of setae and nearly correspond with them. The 

 rows of setae are visible on the clitellar segments. 



The setae are simple, /-shaped, arranged in eight rows, not in 

 pairs, of which four rows are ventral, two lateral, and two dorsal. 

 The innermost rows on each side are about 3 mm. apart, and are 

 about in a line with the inner side of the heads of the dumb-bell- 

 shaped areas. The second rows on each side are about 1 mm. from 

 the first rows. Dorsad of each of these at a distance of about 



3 mm. (measured as in the other case with compasses), is the third 

 row on each side. Dorsad again of each of these and at a distance 

 of about 2 mm. is the outermost row on each side, so that these are 

 quite dorsal in position, and measured across the back, are about 



4 mm. apart, that is only about 1 mm. further apart than are the 

 two innermost ventral rows from each other. 



The two pairs of spermathecal apertures are inter-segmental, 

 between vn and viii, and vin and ix, the pores of the anterior 

 pair a little closer together, and ventrad of the innermost rows of 

 setae. There is a slit-like depression on xiv, on which probably 

 the oviducts open. Male pores slit-like, not very conspicuous, 

 situated on xviii not on prominent papilla?. Nephridiopores not 

 discernible. Dorsal pores throughout after about segment xni, 

 intersegm ental . 



Most of the mesenteries of segments vn to xni are very thick 

 and muscular, those of v, vi, xn, and xv less so, but in the case 

 of the last two thicker than those which follow. 



