232 Transactions of the Boyal Society of South Africa. 
Wellington, Tasmania, but which was immature and in many ways so 
aberrant in regard to the sperm athecal apparatus that it was deemed wise 
at the time of publication not to burden literature of the group with 
another new generic name. 
There is now, however, no doubt but that the Tasmanian form 
constitutes a distinct genus for which the name Tasmaniaedrilus is now 
proposed — T. tasmaniaensis . 
In view of the special distributional interest in the form under descrip- 
tion, we propose the title Gonchuanaedrilus africanus (gen. et sp. nov.). 
GONDWANAEDRILUS, gen. nov. 
Elongate body ; ventral setae paired, one sigmoid, slender and simple, 
the other more markedly sigmoid, stouter, bifid; male pore in xii., female 
pore opening with male pore (?) ; spermathecal pores absent, sperm athecal 
ducts opening into part of male apparatus. 
GONDWANAEDRILUS AFEICANUS (gCU. et Sp. nOV.). 
Numerous individuals were obtained in a ditch on the plateau on 
Stellenbosch Mountain in association with Gammarus (an Amphipod), 
and Moss. No other vermian or invertebrate life was represented, and 
experience with the habitats of Plireodrilidae in Africa and other parts 
indicates that this fact has in all probability a marked significance, which 
we discuss later. 
The individuals collected have an average dimension as follows : — 
Length 20-22 mm. 
Breadth -S-l'O mm. 
Setae. — Each ventro-lateral group consists of two setae. One of these 
is slightly shorter, stouter, and more intensely sigmoid than the other ; 
possesses a distinct modulus, and is strongly bifid at the free extremity. 
The other seta in each of these bundles has a simple pointed extremity. 
The dorsal setae are exceedingly long, and capilliform with a distinct 
sigmoid yet faint curve. Each bundle carries three such setae. These 
setae are so easily broken in mounted and also preserved specimens that it 
is difficult in many cases to make out their distribution. However, they 
were traced forwards as far as segment iii. 
Clitellum. — This structure extends through segments xii, xiii, and xiv. 
In this paper we deal only with the Eeproductive System, which 
constitutes the essential generic system in the group, for variation. 
In all the specimens examined both ova and spermatozoa are abundant, 
indicating that fertilisation must take place during the spring. 
The position of the gonads cannot be definitely stated, but can, at least 
in the case of the testes, be inferred within safe measures. 
