GLANDS OF AUSTRALIAN EARTHWORMS. 123 
deferentia of each side remain quite distinct, and enter the 
spermiducal duct as it leaves the gland. 
29. D. syivarica * (Fletcher), 
Two pairs of testes and rosettes in segments 10 and 1i. 
Sperm-sacs are racemose structures in segments 9 (posteriorly ) 
and 12 (anteriorly). This differs considerably from the original 
description, where the structures in segments 9 and 12 are called 
testes and described as “smooth and white bodies drawn out 
above into digitate processes tapering into fine points,’ while no 
sperm-sacs were mentioned whatever. 
The organs in segments 9 and 12, here called sperm-sacs, and 
which have both the position and appearance of those structures 
in other forms, are conspicuous, white, and greatly mammillated. 
Also there are distinct digitate though small testes in their 
normal positions on the anterior wall of segments 10 and 11. 
Spermiducal glands are bilobed and large. The duct is short 
and muscular, and embedded in the body-wall. The two vasa 
deferentia of each side enter the spermiducal duct as it leaves 
the gland. 
30. D. excavata } (Fletcher). 
In one specimen, testes and rosettes were present in segments 
10 and 11. 
The sperm-sacs were grape-like, in segments 9 (posteriorly) 
and 12 (anteriorly). 
In this the spermiducal gland consisted of a long tubular 
structure, the anterior part lying in segment 18, considerably 
larger and flatter than the posterior part which extended back in 
segments 18 and 19. The duct leaves the gland at the beginning 
of the tube and is short, running down obliquely to open on the 
surtace. The duct is less muscular than usual, and into it at 
the base of the gland opens the single vas deferens formed by 
the union on each side of the two vasa deferentia. On the inner 
side of the duct and opening into its lower portion are two 
slightly muscular seta-sacs, each containing one long seta. 
In a second specimen there was no appearance of testes as 
distinct from the sperm-reservoirs, which occupied segments 10 
* Proc. Linn. Soc. N.S.W. vol. i. (2) p. 558: Didymogaster sylvatica 
(Fletcher). Beddard, Joc. ct. p. 487. 
+ Ibid. vol. ii. (2) p. 383: Perissogaster excavata (Fletcher), Beddard, loc. 
cit. p. 486. 
Q* 
