14G xXichoTjTjS and Jackson. — \c(c Species of Megaloseolej'. 
Gut: Tliorc is an extremely large and well-formed gizzard iu 
segment G. The oesophageal Avail is thivkened and swollen in seg- 
ments 10 to 11. The mid-gut, whicli is A’ery distinctly marked off 
from the oeso})hagus, has no tyiDhlosole, and begins in segment 17. 
Circulatory system: The last heart is in segment 13. 
Xephridial system; Each segment bears six micronepliridia ou 
each side, all disposed in the same plane. 
Male reproductiA'e organs: (PI. XVI II, fig. .1). Three pairs of 
s])erm sacs occur. They project from se])ta lU/11, 11/12, and 12/13 
iuto sognieiits 11, 12, and 13. The second pair is the largest, but 
they are all coni])arjit ively small. Tlie third ])air is little more than 
n slight finger-like projection from the septal tissue. The spermiducal 
glands are in the posterior half of seginent 18, and have a distinct 
duct, straight, and slightly longer than the glandular region. The 
glandular region itself is irregular in outline, rather oval, and 
flattened. 
The spermathecae (PI. X\MII, fig. 4) are saedike, Avith a short, 
stout <luct into which tlie diverticulum opens. They are median and 
unpaired, and the diverticulum is about half as long as the sperm- 
atlieca itself- 
List of References. 
190G Michaelsen, ^‘Das Tierreich, ’ ’ Part 10. Oligacliaeta. 
1909 IMichaelseii, “ Die Fauna Hudwest-Australiens. ’ ^ Vol. I, Pt. 2. 
Oligochaeta. 
1909 Bage, ‘‘Contributions to our knoAvdedge of Australian Earth- 
A\a)rms. The Ne])hridia. Proc. Roy. Soc. Victoria. Vol. 
XXII, Pt. II. 
1922 Xicholls, “Dero roseola.” Journal Roy. Soc. W.A., Vol. VII. 
Explanation of Plate XVIII. 
Pig 1 M. . External vicAV. 
2 M. loiigicystis, Spermatheca. 
3 M. affiiiis, External Auew. 
4 M. af finis, Spermatheca. 
5 Semi-diagramatic sketch of ]>art of tlie internal anatomy of 
same. 
G 
M. swarbriclci, External AueAv. 
