Earthworms from Celebes. 445 



Perichceta purpurea, sp. n. (PI. XXC. fig. 6.) 



There are three specimens of this species. The colour of 

 the worm is deep purple, with only very slightly lighter 

 chaBtal bands, not recognizable anteriorly, so that this region 

 appears continuously purple ; the light bands are plain, but 

 narrow, posteriorly, which is not lighter than the anterior end. 

 The clitellum is of almost the same colour as the rest of the 

 body. The dark bands become lighter on ventral surface, but 

 can be seen to extend round the body. 



The worms measure respectively 72, 90, and 95 x 5 raillim. ; 

 the last worm consists of 116 segments. 



The prostomium is embedded in one third of the first seg- 

 ment, and marked off by a transverse line from the latter. 



The male pores are fairly distinct though small slits, not on 

 a tumid papilla. There are five chsetse between the pores 

 (fig. 6&). 



This species is characterized by the number and arrange- 

 ment of the copulatory papillae. In segment xviii., both at 

 the outer and at the inner end of each male pore, is a small 

 pitted papilla. On segment xvii. there is a pair of similar 

 but slightly larger papillae just behind the chgetal ring, in a 

 line with the inner (mediad) papillae of segment xviii. In seg- 

 ment xix. there is a similar pair of papillse, similarly situated. 

 There are thus eight papillge, four on segment xviii. and 

 two on each of the segments xvii. and xix. Further, there 

 is a pair of papillae on each of the segments viii. and ix., 

 situated just behind the spermathecal pores and lying in front 

 of the chaetas of these segments. 



There are two pairs of spermathecal pores between segments 

 vii./viii., viii./ix., with about a dozen chaitse between them. 



These pores and the papillae lie in a light brown glandular 

 area, nearly square in shape, extending from the chaetal ring 

 on segment vii. to that on ix. (fig. 6 a). 



The oviducal pore normal. 



Clitellum normal, without chaetae. 



The first dorsal pore is xi./xii. 



The chcetce form a complete ring and number 

 34 on segment ii. 

 54 „ vi. 



70 „ xiii. 



70 „ XXV. 



Internal Anatomy. — None of the septa are noticeably thick, 

 though those between segments x.xi., xi./xii. are rather 

 stouter than the rest. 



The gizzard has the usual bell-shape and lies in the usual 

 Ann. (& Mag. N. Hist. Ser. 6. Vol. xviii. 31 



