244 FRANK E. BEDDARD. 
the whole of the sacs being wide. Finally in the present 
species we have the other extreme. The entire sperm-sacs 
are formed by the slender tubes referred to. 
The female reproductive organs present a fourth variety, all 
the species at present known being different in the form of 
these organs. They are most like those of Polytoreutus 
kilindinensis. P. Finni agrees most closely with P. kilin- 
dinensis in the general form of the spermatothecal sacs. As 
in the last-named species, there are only a single pair of diver- 
ticula of the median unpaired sac. The latter runs beneath 
the nerve cord until it reaches the anterior boundary of the 
bulbus of the male efferent apparatus. Arrived at this point 
it diverges to the left, and, forming a semicircle, again bends 
to the middle line, and opens by means of a dilated terminal 
sac behind the orifice of the atria. Anteriorly this median 
sac extends as far as the 18th segment. Just below the septum 
which divides this segment from the one in front, it divided 
into two. Each branch swells out as in P. kilindinensis 
and forms a largish oval sac. The two sacs are coiled to some 
extent round the intestine. From the base of each, not far 
from the point where it joims the median sac, a short tube is 
given off, which passes into the receptaculum ovorum and 
thence becomes continuous with the oviduct. The arrange- 
ment of these parts is, in fact, precisely as in Polytoreutus 
kilindinensis. They are illustrated in fig. 6. 
Alluroides Pordagei, n. gen. (figs. 4, 5). 
I shall describe this new form under the name of Allu- 
roides Pordagei. It was collected along with a number of 
examples of Stuhlmannia variabilis in a swamp four miles 
up country, opposite to Mombasa Island. The species is re- 
presented by only two individuals, measuring in the preserved 
state about an inch in length. They had a delicate appear- 
ance owing to their small size and the thinnish body walls, 
and resemble somewhat, except in colour, an aquatic member 
of the family Phreoryctidee which I have lately described from 
New Zealand under the name of Pelodrilus violaceus. In 
