DESCRIPTIONS OF EARTHWORMS, 54 
P. fasciata Rosa (Engano). P. longa, as stated by Michaelsen, 
much resembles P. musica and is only distinguished by 
the shape of the male pores and the smaller number of 
setae; perhaps both species are identical, for the shape of 
the male pores appears to me not to be constant and as 
already stated in my earlier paper, in small specimens of 
P. musica the number of setae amounts only to 60 or 70. 
Our species from Soemba appears to be distinguished from 
P. fasciata and P. musica as well by a smaller number of 
setae as by a different situation of the male pores. 
Perichaeta Tenkatei n. sp. 
Three specimens collected by Dr. ten Kate at Wamga- 
poe in the North of the island Soemba. 
Besides the preceding species three other Perichaetae 
were collected in Soemba, which are distinguished by their 
more slender appearance, tapering anteriorly and posteriorly. 
The body measures 85 mm. in length; the number of 
segments is about 100. The clitellum shows distinct dorsal 
pores, not visible in the preceding species; the first dor- 
sal pore lies in the intersegmental groove XI/XII. The 
prostomium extends back over the half of the buccal seg- 
ment. The setae are arranged in a continuous row, upon 
a distinct ridge; there are about 50 of them on the seg- 
ments in the vicinity of the clitellum, but none on the 
clitellum itself. 
Two pairs of spermathecal pores lie at the ventral side 
of the body in the intersegmental grooves VII/VIII and 
VIII/IX. The male pores, situated on large papillae, pre- 
sent themself as semilunar fissures, surrounded by a bor- 
der, the half of which is crenulated, while the other half 
forms a lid, that covers the pore, like with P. capensis 
(operculata Rosa). ') 
The spermathecae (fig. 4) strike the eye by the large- 
1) Exotische Terricolen; Ann. K. K. Naturhist. Hofmuseums, Wien, Bd. VI, 
1891, pl. XIV, fig. 6. 
Notes from the Leyden Museum, Vol. XV. 
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