68 



last-named species, from Java and Borneo, has only 46 setae in seg- 

 ment VIII , and its spermathecae consist of a globular pouch and a 

 ramous diverticulum. P. quadragenaria may perhaps be identical 

 with P. sangirensis , but this cannot be decided, without examining 

 the type-specimens; our examples can in no case be identified with 

 one of them. P. minima is sufficiently distinguished by its small size , 

 by the presence of papillae upon segment VII, and by the shape of its 

 spermathecae. 



15. ? Perichaeta sangirensis Michaelsen. 



Sumatra: Manindjau. 

 A small Perichaeta-s^ecimen , measuring only 27 mm. in length, was 

 collected at Manindjau. There are two pores of spermathecae visible 

 in the intersegmental groove VII/VIII. The spermathecae, situated 

 in segment VIII , consist of a globular sac , with a rather long, mus- 

 cular, excretory duct and of a pyriform diverticulum, communicating 

 with the main sac by a short, non-coiled duct. The 8th and 9th 

 intersegmental septa appear to be absent. The prostata-glands are not 

 well developed. Perhaps the specimen is identical with P. sangirensis , 

 one of the malayan species , with only a single pair of spermathecae ; 

 the other ones (P. quadragenaria and P. racemosa) having a diver- 

 ticulum of quite another appearance. 



16. Perichaeta dubia n. sp. 



Sumatra: Mount Singalang, five specimens; Paninggahan, in 



the forest, three specimens. 



Among the Perichaetidae , collected in Sumatra, there are some 

 specimens, which, though agreeing with P. Houlleti in the number 

 of spermathecae (four pairs) cannot be referred to this species , because 

 their spermathecae do not show the characteristic appendicles, and 

 the clitellum wants the peculiar rudimentary setae. 



The largest of the examples, collected in the Paninggahan-forest , 

 measures 140 mm. in length ; the number of its segments amounts to 

 about 120. The cephalic lobe extends nearly to the middle of the 

 buccal segment. First dorsal pore in the intersegmental groove XII/XIII. 



The apertures of the spermathecae are very obvious , situated in the 

 intersegmental grooves of segment VI/VII, VII/VIII and VIII/IX, 

 and are surrounded by a white, glandular area. 



