302 W. BLAXLAND BENHAM. 
sections in a longitudinal series; these are represented in Pl. 
XVI, fig. 24, a, b,c, d. 
A small pore on the anterior margin of Somite 11, just out- 
side the peripharyngeal nerve commissure, leads by a short 
duct with a narrow lumen into a dilated portion (fig. 24, 0.), 
which is filled with a coagulum (coag.) ; from this “ bladder ” 
a tract of cells (fig. 24, c.) leads backwards to a small coiled 
tubule which appears to end blindly (fig. 24, d.). I am unable 
to detect a lumen in the tract of cells lying between this coil 
and the “ bladder.” 
On the opposite side of the body, occupying the same posi- 
tion as this minute structure, which is absent on this side, I 
find the small nephridium above mentioned; so that I think 
there can be little doubt as to the correctness of my interpre- 
tation of this minute organ as a “ vestigial” nephridium. I 
expected that these two small nephridial pores and ducts 
would lead to ‘‘ peptonephridia,” but such is not the case; 
there is no modification of the anterior nephridia other than 
degeneration. 
GENITAL SysTEM. 
The two pairs of testes, and of spermiducal funnels, the 
pair of ovaries and oviducts, are placed in the usual segments. 
The ovary (Pl. XVI, fig. 25) is rather remarkable, in that 
the ripe ova are not confined to the tip of the organ, but are 
present along the whole of one side. The ovary is attached to 
the septum by only a small peduncle; it is not pear-shaped, as 
in Lumbricus, but slightly lobed, and more closely resem- 
bling the testes in shape than is usually the case. I am not 
acquainted with any ovary amongst the Oligocheta with 
exactly this form, though Horst has figured some curiously 
shaped ones in Benhamia Schegelii,' where it is rosette- 
shaped; B. Buttikiferi,? where it is somewhat like the 
parent ovary. The oviducts open close to ventralmost chztz 
of their respective sides, at the tip of very slight papille. 
1 *Notes from the Leyden Museum,’ 1887, pl. iv, fig. 7. 
? Ditto, pl. v, fig. 6. 
