DESCRIPTIONS OF EARTHWORMS. 323 
series of the 7th seta; there are 12 setae between both pores. 
The circles of bristles are continuous, except in the 
dorsal median line; there are 36 à 40 of them upon each 
segment. 
The spermathecae (fig. 5), situated in segment VI, con- 
sist of a rather large, urceolate pouch and of a bended, 
tubular diverticulum, that reaches till about two thirds of 
the main pouch and before opening in it suddenly nar- 
rows. I found the diverticulum, as usually, entirely filled 
with sperma, whereas the pouch contained sand and other 
strange material, giving it a blackish colour. 
In one specimen another pair of spermathecae, smaller 
than the anterior ones, was observed in segment VII, 
opening in the intersegmental groove VI/VII. 
As to its internal structure this species agrees with other 
Perichaetae; a well-developed prostata is present, provided 
with a S-like bended duct, terminating in a dilated sac. 
In some specimens this dilated part is protruded to the 
exterior. There are in segments XI and XII two pairs of 
large, tongue-shaped seminal vesicles, each with a hooked 
appendage at the distal extremity. Long intestinal coeca 
occur in segment XXVI. 
Several Perichaeta-species, provided with only a single 
pair of spermathecae, are already known, as well from 
the Malay Archipelago (P. quadragenuria Perr., race- 
mosa Rosa, P. sangirensis Mich., P. minima Horst, P. sp. 
from Flores) as from other isles in the Indian and Paci- 
fic Ocean (P. novarae Rosa, P. vitiensis Bedd., P. tapro- 
banae Bedd., P. pulchra Mich.); but with none of these 
species the Perichaetae from the Lampongs could be iden- 
tified , because all those species have not only spermathecae 
of a different shape, but their spermathecal pores lie also 
more backward. With P. minima those pores are situated 
on segment VII, with P. racemosa in the intersegmental 
groove VIII/IX and with the other ones in the groove 
between segment VII and VIII. 
Notes from the Leyden Museum, Vol. XV. 
