STUDIES ON EARTHWORMS. 220 
spermathecal pore, is a line of four or five smaller pores. 
The male pores are in somite xvii1, and each is situated 
on a papilla, which is studded by a row of smaller pores 
in front and behind, each pore belonging to a small sac 
internally. 
P. robusta, from Bourbon and Manilla.—Its length is 150 
to 180 mm., breadth 6 mm. There are forty-five sete in each 
somite. There are two pairs of spermathece in somites virr, 
Ix, opening anteriorly. Each consists of a large, ovoid sac, 
into the neck of which opens the duct of anarrower sac. Just 
behind these is a much smaller sac opening to the exterior on 
a papilla just behind the pore of the spermatheca. Between 
the male pores are two papille, each with a small pore. Ne- 
phridia are present as extremely delicate tubules attached to 
the septa. 
Perrier gives the name P. robusta to the worm described 
by Leon Vaillant (24), under the name P. cingulata, Sch. 
6. With more than two pairs of spermathece. 
P. affinis from Cochin China.—Length 110 mm., breadth 
5mm. The number of sete is not mentioned. There are four 
pairs of spermathece lying in somites vi, vII, viz and rx, 
opening anteriorly. These pores are quite lateral. Each con- 
sists of a large globular sac, with a smaller globular sac open- 
ing into its neck. There are no papille near their pores. 
The male pores are on papillz, and there is in addition a pair 
of papillz in somite xvi, and a pair in xIx. 
Perrier considers this worm to be the same as Vaillant’s P. 
posthuma. 
(Horst’s Pericheta from Java belongs to this group (31).) 
In the same memoir Perrier describes two new species of 
Lumbricus. 
L. americanus, from New York. Length 1 dem. It 
seems to differ from L. agricola only in having the pos- 
terior pair of ciliated rosettes of the sperm duct rather larger 
than the anterior pair. Perrier mentions that the ciliated 
rosettes are not enclosed in the seminal reservoirs, but that, 
I think, merely depends on the state of maturity of the worm, 
