GLANDS OF AUSTRALIAN EARTHWORMS. IDL 
glandular ceils, which may extend through one, two, or even 
four segments (a.g., fig. 3), or, on the other hand, may rarely be 
absent altogether. The surface of this glandular mass has a 
mottled brown appearance, due to small patches of pigment. 
Its presence in these segments probably depends on the state of 
maturity of the individual. 
2. M. vicrorim * (Spencer). 
Two pairs of testes and rosettes are present in segments 10 
and 11; the sperm-sacs are situated on the posterior wall of 
segment 9 and on the anterior wall of segment 12. The spermi- 
ducal glands (sp.g., fig. 4) are long, regularly-coiled tubes occupying 
segments 18 to 26, or even 29, one coil to each segment. The 
spermiducal duct is long and muscular, running transversely in a 
double loop towards the ventral surface in segment 18, where it 
opens. The two vasa deferentia of each side remain quite dis- 
tinct for their whole length. They run alongside the gland-duct 
for some distance, and pass straight through the substance of 
the lower part of the gland, entering the gland-duct just before 
it leaves the gland. 
6 
3. M. InsuLARis + (Spencer). 
Testes and rosettes in segments 10 and 11. 
Sperm-sacs in segment 9 (posteriorly) and segment 12 (an- 
teriorly). 
Spermiducal glands very long coiled tubes in segments 18 to 
27; duct long, muscular, and but slightly curved. The two vasa 
deferentia on each side join before reaching segment 18, and the 
single vessel so formed runs in the muscular wall of the gland- 
duct, and so enters the duct about one-third of its length from 
the gland. 
4. M. HOBARTENSIS { (Spencer). 
Two pairs of testes and rosettes in segments 10 and 11. 
Sperm-sacs in segments 9 (posteriorly) and 12 (anteriorly). 
The spermiducal glands are long and coiled, extending through 
segments 18 to 24 or 25. The muscular duct from each re- 
sembles closely that of WZ. insularis, being long and slightly 
curved. The vasa deferentia also unite on each side before they 
* Proc. Roy. Soc. Vict. 1892, p. 189: Cryptodrilus victorig, Spencer. Bed- 
dard, doc. cit. p. 488. 
t Ibid. 1894, p. 41: Cryptodrilus insularis, Spencer. 
t 4bid. 1894, p. 37: Cryptodrilus hobartensis, Spencer. 
