Earthivorms from Celebes. 431 



The chretce form a complete circle, without any perceptible 

 dorsal or ventral gap. 



I counted on the body 70 chtetaj on segment iii. 

 70 „ „ ix._ 



100 „ „ xxiv. 



The first dorsal pore is between segments xii./xiii., though 

 possibly it occurs earlier, as the worms are strongly contracted ; 

 in front of the clitellum it is impossible to see tlie pore. 



The internal anatomy presents the usual characters of a 

 ^^Perichceta^^ (s. str.) asregards gizzard, septa, heart, and CfBcum. 

 The last, however, presents this peculiarity, that it is deeply 

 notched externally, so that, in addition to the long main 

 caecum, some 11 or 12 secondary cseca arise from its base. 

 (See the description of P. digitata.) 



There are two pairs ofspermathecce in segments viii. and ix. ; 

 each is a nearly spherical sac, with a short narrow duct, into 

 which opens a long undulating diverticulum, slightly dilated 

 terminally to form a somewhat oval sac (fig. 1 c). The 

 anterior spermatheca on each side is about half the size of 

 that in the ninth segment. 



The spermiducal gland is relatively small ; it is confined 

 to segment xviii., though it pushes the posterior septum back 

 nearly to the next septum. Roughly speaking, the gland is 

 triangular when viewed from above, compact, only slightly 

 notched (fig. 1 b) . The duct, which is stout and short, runs 

 alongside it in an obliquely longitudinal direction ; but the 

 gland itself really underlies the hinder part of the duct, so 

 as to appear from below it on its mesial side. 



I noted nothing else characteristic in the worm. 



The comparatively large size of this worm allows only a 

 few species to be compared with it, and of those occurring in 

 the same region none appear to resemble it in colour. But I 

 find that authors frequently omit a careful description of 

 colour ; and although Beddard has insisted on its importance, 

 he himself, in recent papers (Monograph, and P. Z. S. 1895 

 and 1896), says little about it. As for structural characters, 

 this worm approaches none of the other species closely. 

 Most of the worms with two pairs of spermathecas in segments 

 viii. and ix. are much smaller, and amongst the non-papillate 

 species there are none that can be pointed to as like it in its 

 totality of characters. 



The diagnosis of the species is as follows : — 



Dark olive-green ; measuring 315 x 10 millim.; 150 segments. 

 Male pores large, at each end of dumb-bell-shaped 



30* 



