GLANDS OF AUSTRALIAN EARTHWORMS. 121 
24. M. Inurpe@nr* (Spencer). 
Two pairs of testes and rosettes as usual in segments 10 and 11. 
Sperm-sacs in segments 9 (posteriorly) and 12 (anteriorly). 
Spermiducal glands are bilobed and flattened, and wrap round 
the alimentary canal; their ducts are short but S-shaped. 
The two vasa deferentia of each side unite only as they reach 
the level of the spermiducal duct. The single vessel thus formed 
enters the wall of the duct, and runs up in it, uniting with the 
gland-duct just as it emerges from the gland. 
VII. DieastEer. 
25. D. armirera fT (Fletcher). 
Two pairs of testes and rosettes in segments 10 and 11. 
Sperm-sacs in segments 9 (posteriorly) and 12 (anteriorly). 
In one individual the whole of the segments 10 and 11 was filled 
with masses of developing sperm in which the rosettes were 
embedded. No definite membrane enclosed the mays, nor could 
any special representative of a testis be found, even in section ; 
but it may probably be regarded as a sperm-reservoir. The size 
of the true sperm-sac in segment 12 is quite abnormal, and has 
almost completely closed up segment 13 by the pushing back of 
its anterior wall. The blood-vessels in this segment were also 
unusually large. In one specimen sperm-sacs were also present 
in segments 14 and 15 (anteriorly). 
The spermiducal glands are present in segments 17, 18, and 19, 
or sometimes only in segment 18, which is then much extended. 
The giands are lobate, usually with three lobes more or less divided 
off. The whole surface is distinctly marked off into similar irre- 
gular areas to those seen in Megascolex Frenchi. The gland-duct 
is comparatively large and long, and is slightly curved (fig. 13). 
The two vasa deferentia of each side run very close together in the 
body-wall, and enter the spermiducal duct just after it leaves 
the gland. 
Lying posterior to the gland-duct are two narrow sacs with 
slightly muscular walls. Each of these contains two well-marked 
penial setze in a well-marked sheath. Lach is curved and long, 
and is ornamented near the tip with numerous little short spines, 
as described by Mr. Fletcher, ending in a chelate point. The 
* “Descriptions of Australian Harthworms.” Proc. R. 8. Vic. vol. xii. pt. 1. 
+ Proc. Linn. Soc. N.S. W. i. (2) 1887, p. 947. Beddard, (oe. ci. p. 486. 
LINN. JOURN.—ZOOLOGY, VOL. XXVIII. 9 
