Earthworms frotn Celebes. 441 



on segment xxvii., notched, as in the two preceding species, 

 but with only three or four well-defined secondary cseca ; and 

 the lower part of base is traversed by furrows, indicating 

 several other lobes. 



There are six pairs of spermathecce^ but of these only the 

 last two pairs in segments viii. and ix. are readily seen ; in 

 fact, I overlooked the four anterior pairs at first (fig. 6d). 



The sac of the last two pairs is very irregular in shape, 

 shrunken, and notched, but apparently each is normally con- 

 stricted about one third from the apex and marked with circular 

 rings ; the diverticulum is longer than the sac — or, at any 

 rate, as long as it, for the diverticula varied on the two sides ; — 

 the duct is in the form of a zigzag, and is dilated terminally 

 (fig. 5 c). The sperm atheca in segment ix. is about half 

 as long as the gizzard, that in segment viii. about half as large 

 as that in segment ix. 



The anterior four pairs are all very much smaller and 

 diminish in size from behind forwards ; in the case of the 

 two pairs in segments v. and vi. the diverticulum is much larger 

 than the sac, which is pyriform ; in segment iv. there is only 

 one structure, apparently the sac. This is very minute, can 

 only be seen under a dissecting-lens, and is readily torn from 

 the body ; but I found it on both sides, and thus am in no 

 doubt as to its being a real structure. 



I can recall no species either with so many as six pairs of 

 spermathec£e or in which such a difference in size between 

 first and last occurs. 



The sperm-sacs in segments xi. and xii. are lobulated ; there 

 are two ovisacs on each side in segments xiii. and xiv. 



The spermiducal gland is unusually " compact " and rela- 

 tively small (fig. bh). Tt consists essentially of three partially 

 superposed long narrow lobes, with their longer axes at right 

 angles to the axis of the body. The anterior lobe is highest 

 when the worm is pinned out — that is, it is inmost in the 

 natural position and pressed against the side of the intestine, 

 so as to be concave on this surface. The other lobes project 

 from below one another, as in the figure. The duct is slightly 

 curved, lies transversely with concavity forwards. There is 

 no muscular bulb. 



Remarks. — Seeing that the first spermatheca is extremely 

 small, probably vestigial, it occurred to me that perhaps this 

 worm had already been described as one with five sperma- 

 thecse. Beddard gives two species in this condition, viz. : — 



P. violacea, which is much smaller and diflferent in every 

 way ; and 



F. jjentacystisj which, though about the same size, has a 



