238 FRANK E. BEDDARD. 
unpaired calciferous pouches are in Segments 1x—x1, and are 
reddish in colour. 
Reproductive Organs.—The sperm-sacs are, as in the 
other species of the genus, long, but they are by no means so 
elongated as in Polytoreutus magilensis; they commence 
in the same way in the 11th segment, and are at first thin tubes ; 
in the next segment, however, they attain their ultimate size, and 
extend back to about the 27th segment. The two sacs run close 
together on the dorsal surface of the intestine, but they do not 
become fused as is the case with Polytoreutus violaceus; 
the sacs are constricted where they pass through the segments ; 
their whitish colour contrasts with the orange colour of the 
atria, which extend through the same segments that they do. 
There is a single pair of sperm-ducts which open into the 
llth segment; they show the usual dilatation before their 
opening; the atria present no noteworthy particulars; they 
extend as far back as do the sperm-sacs. It is in the disposition 
of the spermatothecal pouches that the present species is chiefly 
to be distinguished from its congeners. 
Fig. 8 illustrates the arrangement of the sacs. From the © 
point of opening on to the 17th segment a narrow median 
tubular sac passes forwards beneath the nerve-cord up to the 
14th segment; here it divides into two sacs, each of which 
immediately becomes dilated into a wide pear-shaped pouch 
lying transversely to the longitudinal axis of the body; just 
where this pouch narrows into the stalk which connects it with 
the median spermatothecal sac a short tube arises, which very 
soon dilates into the funnel of the oviduct; the latter is a 
globular sac, as in other species of the genus, and is connected 
on the one hand with the oviduct, and on the other with the 
egg-sac, as is shown in the figure. I could find no sper- 
matophores in the sac—not the least trace of the bundles 
of spermatozoa figured by Michaelsen (Taf. iv, fig. 30, sk.), 
and observed by myself in Polytoreutus magilensis, were 
to be seen in the present species. 
The spermatothecal sac of the present species is the simplest 
that has yet been met with in the genus. The appendices of 
