BY J, J. FLETCHER, 
1543 
The last pair of hearts in xii (in one specimen but in xiii in 
another). 
Nephridia : three pairs of small convoluted tubules in each 
segment after the first, in three straight rows on either side. 
nab. — Burra wang, and Illawarra, N.S.W. 
This is a very distinct new species, differing from any Australian 
species yet described in having two pairs of prostates; nevertheless 
as there is but a single pair of male pores I propose to retain it in 
the genus Cryptodrilus, at any rate for the present. 
Cryptodrilus tenuis, n.sp. 
Three specimens and an anterior fragment (not in good condition), 
about 90 mm. long by 4 mm. broad, the body tapering towards 
posterior extremity ; number of segments about 190. 
Colour pallid (probably bleached, but even allowing for this 
lighter than in C. faatigatus). Prostomium completely divides 
buccal ring. 
Setie of the two outer couples further apart than those of the 
inner, the outermost row dorsally situated. 
Clitellum not developed in any of the specimens. 
Male pores on conspicuous papillie corresponding with the interval 
between the setEc of the inner couples ; two pairs of spermatliecal 
poi es opposite the first sette. 
No accessory copulatory structures visible. 
Nephridiopores three pairs to a segment after the first one on 
the anterior margin of the segments opj) 0 .site the first, between the 
second and third but nearer the latter, and opposite tlic fourth 
set.'e respectively on each side. 
Dorsal pores (not satisfactorily determined, very inconspicuous 
if present). 
Alimentary canal [tresents modifications, dilatations but not 
pairs of pouches, in about segments x or xi-xvi. 
