NEW MEGASCOLEX. 
99 
The nephridial system is micronephric. 
Anterior Male Organs.—Two pairs of glittering sperm-duct 
funnels lie ventrally in the tenth and eleventh segments ; they are 
free, not enclosed in testicular vesicles. Two pairs of racemose 
sperm sacs depend from the septa X./XI. and XI./XII. into 
the eleventh and twelfth segments respectively. The single 
“ berries ” or lobules of the sperm sac clusters are rather small and 
globular. 
The prostates are small, the glandular part racemose or rather 
villose, with small and densely crowded glandular knobs at the 
* 
[ 
Fig. 2a .—Penial seta of 
M. willeyi, slightly enlarged. 
surface. The muscular duct is straight, about as long as the 
glandular part, rather thick, somewhat tapering towards the ends, 
nearly spindle-shaped. 
Penial setee slender, about 1 mm. long, proximally 13^ thick, in 
the middle about 10 y thick, distally tapering gradually, somewhat 
before the distal extremity still thick. They are bent in a very 
characteristic manner, arcuate below the tip. The latter is simple, 
but the convexity of the arc (occupying the distal sixth part of the 
seta) is beset with densely crowded transverse rows of rather 
long spine-like hairs, which are nearly as long as the thickness 
of the seta at this point. These rows of hairs form transverse 
semicircles and are restricted to the convexity of the distal 
curvature ; they diverge distalwards from the stem of the seta. 
(Figs. 2 a and 26.) 
