262 WILLIAM BLAXLAND BENHAM. 
drilus the pores of the sperm ducts are in pits, the edges of 
which are produced backwards as a ridge, on each side of 
somite xx. 
There are four male pores in Moniligaster, one pair be- 
tween somites vit and vir1, and one pair between somites x and 
x1; similarly in Acanthodrilus one pair is on somite xvitr, 
and one pair on somite xx. From the sides of each of the latter 
the bunches of penial setz project. 
The Female Organs.—These consist of the ovaries, 
oviducts, and spermathece. 
The ovaries are usually of small size and are frequently 
overlooked ; for instance, in Titanus brasiliensis Perrier 
could find none, but he mentions a pair in somite xvii in T. 
forguesii (29, p. 235). 
The ovaries are a single pair; they are always placed be- 
hind the seminal reservoirs, but in Plutellus a pair of 
grape-like organs, supposed to be the ovaries, are situated in 
somite x, in front of the male organs. 
In shape they are pyriform in Lumbricus (x11r), grape-like 
in Plutellus (x), Pontodrilus (xin), Perionyx (xm) 
[Microcheta (x111)], tongue-shaped in Moniligaster (x11 
to xv), though it is doubtful whether these exceptionally large 
organs in the last genus are ovaries. 
In Pericheta they are flat, pedunculated structures situated 
in somite XIII. 
In Acanthodrilus it is doubtful whether the lobed organ 
described by Perrier in somite 1x is an ovary or not; but 
Beddard has described (40) the ovary of Ac. capensis in 
somite XIIf. 
In Eudrilus the ovary, according to Perrier, is very ex- 
ceptional ; it is a globular sac, which is sessile on a supposed 
“‘ spermatheca ” in somite x11 or xiv. The ovary has not been 
found in Anteus, Rhinodrilus, Digaster, nor in Uro- 
cheta, and is very doubtful in Pleurocheta and some of 
the above genera. 
The oviduct is known in still fewer forms, though its pore 
is sometimes noticeable. In Lumbricus it is a short, rather 
