Contributions to a Knowledge of South African Oligocliaeta — Part II. 243 
along with the spermathecae. On these grounds the institution of a new 
genus would here be necessary were it not that a similar shifting of the 
pores dorsally is, as mentioned above, found in some other species 
occurring in other parts, as in New Zealand. 
Externals. — 
Length, 30 mm. extended. 
Breadth, 1 mm. extended. 
The setae in general are arranged in two dorso-lateral and two ventro- 
lateral groups. 
In the ventro-lateral groups there is a pair of setae, one of which is 
sigmoid, simple, and longer ; the other bifid, more strongly sigmoid, and 
shorter. In some segments the setae are either both simple, or one bears 
a very indistinct notch. 
The dorsal setae are elongate and capilliform, and in some of the more 
anterior segments three were noted in each bundle. 
The clitellum extends through segments xii and xiii, and is well 
developed both on the dorsal and ventral aspects, but extends further 
forwards dorsally than ventrally. Ventrally it covers only the posterior 
part of xii. The male genital pore opens m segment xii near its 
posterior margin. 
The female pore is situated immediately behind the septum separating 
xii and xiii, but in the individuals examined was not very distinct. An 
indistinct structure representing an oviduct was followed for some 
distance upwards from each female pore. 
The spermathecal pores are situated on the dorsal side of xiii. 
Syerinatliccac. — These structures resemble in their disposition and 
extent those of P. heddardi. As noted previously, the pores are situated 
on the dorsal side of segment xiii towards its posterior margin. The 
septa are very indistinct, and in counting the segments the segmental 
dilatations of the alimentary canal have been used as a check. 
From each pore the duct passes backwards, that on one side being 
horizontal and dorsal to the mass of sperms in xiii and xiv, and then 
passing obliquely backwards and downwards through the posterior portion 
of xiv behind the sperm mass, through xv to the posterior region 
of xvi. The duct of the other side passes directly obliquely backwards 
ventral to the sperm mass mentioned above. In the posterior portion of 
xvi both ducts turn on themselves, and become much wider and more 
heavily equipped with musculature. This widened structure then passes 
through the septum separating xvi and xvii into the thin-walled sperma- 
thecal chamber. Each spermathecal chamber consists of a horizontal 
ventral portion and a posterior vertical limb. The horizontal division 
