DESCRIPTIONS OF EARTHWORMS. 317 
whitish ridge. On the clitellum neither intersegmental groo- 
ves nor setae are visible. Segments [X— XIII have a great 
longitudinal diameter, a third longer than that of the fo- 
regoing segments. 
The rectangular prostomium extends back over the half 
of the buccal segment. 
The spermathecal pores are distinct, semilunar fissures , 
situated in the inter-segmental grooves VII/VIII and VIII/ 
IX, on each side of the belly. 
The oviducal pore is situated upon a white area in seg- 
ment XIV. 
The male pores lie upon a large, transverse, oval papilla, 
extending forward and backward till segment XVII and 
and XIX. Dorsal pores are only recognizable behind the 
clitellum. There are about 60 setae on the segments in 
front of the clitellum. 
The Stk, 9th and 10th septa are absent. The gizzard 
occupies segments IX and X; the intestinal coeca of seg- 
ment XXVI are conical, moderately developed. Two pairs 
of spermathecae in segments VIII and IX; each of them 
(fig. 1) consists of a broad, oval pouch with a short, 
wide duct and of a thick, falcate diverticulum, that is 
nearly as long as the pouch, the diverticulum communi- 
cates with the main pouch by a short and narrow, S-like 
bended duct. The diverticulum of the anterior spermatheca 
sometimes lies in front of the septum, in segment VII. 
The prostate is a highly lobulated gland, opening on 
the exterior by a muscular duct, as usually bent upon 
itself and provided with a dilated sac at its extremity. 
Though already nine species of Perichaeta, furnished 
with two pairs of spermathecae, have been described from 
the Malay Archipelago, our specimens could not be iden- 
tified with one of them. 
? Perichaeta sangirensis Michaelsen. 
One specimen, collected by dr. ten Kate at Sikka in 
East Flores. 
Notes from the Leyden Museum, Vol. XV. 
