232 WILLIAM BLAXLAND BENHAM. 
4) are wide apart. The nephridiopores are ina line with 
seta 2, but only commence in somite xiv. The male pore 
is in somite xvitl, in line with seta 1. There is an ellipsoidal 
copulatory papilla in the ventral mid-line between somites x1x 
and xx, and another between xx and xx1. The oviduct opens 
in somite xiv. There are two pairs of spermathece in 
somites vim1 and 1x, each having a small spherical appendage ; 
their pores are on the anterior edge of the somite in line 
with seta 1. The ciliated rosettes of the sperm duct 
are in the somites preceding the seminal reservoirs, which lie 
in somites x1 and x11. There is a large prostate in somite 
xviut, There is no gizzard and no subneural blood-vessel. 
Grube (30) has described, under the name Lumbricus 
littoralis,a worm from Villafranca, which is probably another 
species of Pontodrilus. This has three pairs of ‘‘ copulatory 
papille,” in line with setz 2, in somites xx, xx, and xxI. 
In 1875 M. Perrier (32) described four species of Pericheta 
from the Philippines, and one from Cochin China. 
P. bicincta has only two somites in the clitellum. 
P. biserialis has the usual three somites in the clitellum ; 
there is a ventral median and a lateral break on each side in 
the ring of setz, and the ventralmost seta on each side is 
larger than the other setz of the somite. There are several 
pairs of copulatory papillz behind the male pores. 
P. luzonica has a similar arrangement of setz, but has 
the clitellum on four somites (xiv to xvit). 
P. cerulea also has the clitellum on three somites. 
P. Juliana (from Saigon) has a continuous ring of setz 
on each somite. It has four pairs of spermathece. 
Grube described (32a) an Earthworm from Rodriguez, and 
named it Pericheta rodericensis. 
Lankester, in 1879, described an Acanthodrilus from Ker- 
guelen (33), A. kerguelenensis, in which the sete are 
separated and form eight rows (but become paired in the genital 
somites); the male pores are in somites xvi and x1x; the sperma- 
thece are in somites viii and 1x; the penial sete are notched. 
The nephridia of this genus are here mentioned for the first time. 
