122 MISS G. SWEET ON THE SPERMIDUCAL 
sete reach the surface through a small duct opening into the 
spermiducal duct just before that duct reaches the external 
opening. 
26. D. GAYNDAHENSIS * (Spencer). 
Two pairs of testes and rosettes in segments 10 and 11. 
Sperm-sacs large in segments 9 (posteriorly) and 11 and 12 
(anteriorly). Spermiducal glands in segment 18 are small and 
flat. The duct is small and short, running straight down to the 
external opening on 18. The two vasa deferentia on one side 
join to form one duct near the gland. Those on the other side 
apparently remain distinct. In each case they traverse the 
substance of the spermiducal gland and run down inside the wall 
of the duct, with which they unite halfway to the exterior. 
27. D. minor tT (Spencer). 
Two pairs of testes and rosettes in segments 10 and 11. 
Sperm-sacs in segments 9 (posteriorly) and 12 (anteriorly)— 
in one specimen in segments 9 and 11. In segments 10 and 11 
in the first specimen, the testes and rosettes were enclosed in 
true sperm-reservoirs. " 
The spermiducal gland is completely bilobed and not flattened : 
’ the duct is formed by the union of a branch from each half. 
The vasa deferentia, two on each side, having remained separate 
through their whole length, pass straight through the substance 
of the lower part of the anterior lobe of the spermiducal gland 
before entering the duct of that branch just before it unites with 
its fellow from the posterior lobe. 
28. D. BrunNEUS { (Spencer). 
One pair of testes in segment 10, and two pairs of rosettes 
in segments 10 and 11. The anterior rosettes are very small 
indeed. 
Sperm-sacs in segment 12 (anteriorly). 
Spermiducal glands larger than in D. gayndahensis, flattened 
and slightly bilobed. The duct is small and less muscular than 
usual, and runs straight into the body-wall. The two vasa 
* ‘Descriptions of Australian Harthworms,” Proc. R. 8. Vict. vol. xiii. pt. 1. 
+ Ibid. pt. 1, Proc. R. 8. Vict. vol. xiii. pt. 1. 
} Ibid. pt. 1, Proc. R. §, Vict. vol. xiii, pt. 1. 
