some Perichete from the Eastern Archipelago. 73 
Pericheta padasensis, sp. n. 
A stout worm; length 280 millim., diameter 6 millim. ; 
96 segments. 
The clitellum occupies segments xiv.—xvi., not quite in- 
clusively. In preserved specimens it is very marked in 
colour, being much darker than the rest of the body. It has 
no sete. 
The male pores are very distinct, but not particularly 
tumid. They are separated by 10 setae (9 in some indi- 
viduals). There are no genital papille. 
The dorsal pores commence between segments xil./xiil. 
The gizzard lies in segments viii. and ix. 
The intestine commences in segment xv. 
There is a pair of ceca originating in segment xxvii. and 
reaching forward through five segments, viz. as far as xxiii. 
The septa v./vil. are slightly thickened; those between 
v./vi. and vi./vil. in a specimen from Merabah had numerous 
processes arising from them, making them appear almost 
racemose. 
There are three large pairs of hearts in segments X1., xil., 
and xiii. 
There are four pairs of spermathece in segments V1., vil., 
vill., andix. The duct of each is large and wide and about as 
long as the pouch, which latter contains, in many instances, 
some whitish solid bodies, possibly spermatophores. The 
diverticula are very small, sometimes single, or, more fre- 
quently, two or three of eraduated s1Zes springing from the 
same spot on the delicate tube that attaches them to the duct. 
The sperm-sacs are paired in segments x., Xi., xil., and 
xiil.; those in xi. and xu. are the largest, and each of these 
has a small process pointed towards the dorsal blood-vessel. 
These processes approach so closely to one another from the 
opposite sides that at first sight they seem joined. The 
pair of sacs in segment xiii. are very small indeed. 
The ovaries are in segment xiii. and the egg-sacs in xiv. 
The spermiducal glands are fan-shaped, cut up into two or 
three distinct lobes. They have a large muscular sac in 
segment xvill., while the glandular part spreads through 
xviii—xvii. and partly into xvi. 
Hab. Merabah and Padas Valley. 
