BY J. J. FLETCHER. 
1553 
Setae on the setigerous segments of about the anterior two- 
thirds of the body 8 per segment, arranged as in Cryptodrilus in 
four couples, the interval between those of the outer couples 
greater (nearly twice) than that between those of the inner couples, 
but less than that between the two couples of each side ; then 
increasing to 12, sometimes only 10 or 11 (6 on one side and 5 on 
the other) visible ; still further back in about the posterior fourth 
of the body — the last four or five smaller segments excepted — the 
setae still more numerous, as many as 28, in this region forming 
two more or less incomplete half-circles, the ventral break very 
well marked the innermost longitudinal rows of setas being straight 
throughout, about twice the width of an average interval ; 
the dorsal break sometimes quite obliterated, some of the dorsal 
setae coming close to the median line ; the setae of the half-circles 
at varying distances apart, sometimes quite close, sometimes 
separated by considerable gaps, hence the rows of setae in this 
region are most irregular. 
Clitellum comprising nearly five segments, xiv-xvii together 
with nearly the whole of xiii, complete all round excej)t for the 
ventral surface of xvii occupied by genital papillae. 
Male pores not conspicuous, on papillae on the two posterior 
annuli of xvii corresponding vdth the intervals between the seta? 
of the inner couples ; a pair of similar papillae in front, on the 
two posterior annuli of the ventral surface of xvii, in worms with 
girdles the papillae larger (usually of both pair.s) and swollen, then 
often taking in the anterior annulus of the segment immediately 
behind them so as to ap[)ear intersegmental, the two jjapillai of 
each side then contiguous or confluent, but more or less separated 
from those of the op[)Osite side by a depression, the area 
occupied by the four papillae and the intervening space circum- 
scribed by a very well-marked raised border or rim, elliptical in 
outline, its long axis transverse, its anterior and posterior margins 
well defined just behind the anterior annuli of .xvii and xix, its 
l.iteral ones more or less fusing with the bases of the papillai whose 
dorsal limits reach to a little dorsad of the inner couples of setie. 
