1907.] WORMS OF THE FAMILY EUDRILIDiE. 427 



the spermathecal sac just before its opening on to the exterior 

 siiddenly narrows to half its former calibre and becomes more 

 muscular, with transverse and longitudinal fibres. At the point 

 where this narrowing begins, two ceeca, one on each side, are 

 given oflt" and slightly curled backwards. These arise therefore 

 from what I have termed the duct of the spermatheca. These 

 caeca are rather longer than the very narrow terminal chamber of 

 the spermatheca, with a diameter half again the Avidth of that 

 chamber ; each cfecum is about half the diameter of the wider 

 part of the duct of the spermatheca. From the extremity of each 

 Cfecum arises a short tube with very weak muscular Avails ; this 

 becomes a little Avider, and at a short distance from the sperma- 

 thecal cascum contains the OAaducal funnel, Avhich can be seen to 

 fan out Avithin the chamber so formed. The oviduct apparently 

 also opens partly into the receptaculum oA'orum ; the short oviduct 

 oj)ens on to the exterior in the usual way. The receptaculum 

 ovorum was full of eggs. I could find no ovary within the 

 chamber into Avhich the funnel of the oviduct opens, and suspect 

 that the ovarial tissue has been entirely transferred to the 

 receptaculum ovorum. In any case, the various sacs and ducts 

 mentioned appeared to form a closed system in which the ovary, 

 if persistent elsewhere, was not included. I am not clear hoAv 

 far this sj)ecies agrees and disagrees with others of the genus. 

 In three of the four species described by Michaelsen, that naturalist 

 figures a tube AA'hich encloses the oviducal funnel at one end and 

 opens at the other into the spermathecal sac. There is no in- 

 dication of any diA-^erticula of the spermathecal sac which receives 

 the " Yerbindungsschlauch," such as I find in Neumanniella 

 ruwenzorii. Nor could I, as already mentioned, detect a special 

 ovarian sac lodging the oA^ary and communicating with the rest 

 of the egg-conducting apparatus, such as Michaelsen found. It 

 should be observed that this bifurcation of the spermathecal 

 sac anteriorly to receive the oviducts is exactly like the disposition 

 of this sac in Polytoreutus. Its presence in the species Neuman- 

 niella riaoenzorii necessitates a revision of the generic characters 

 used by Michaelsen, Avho uses as a generic character the fact that 

 " Samentasche ganz unpaarig." This character alone therefore 

 serves to discriminate the present species from all of those 

 described by Michaelsen. It may be thus defined : — 



Neumanniella ruwenzorii. 



Length 105 mm., breadth 3 mm. Distance hetween ventral setce 

 ahout five times that hetiveen dorsal setce. Some of the setce ctbseni 

 from clitelluvi. Clitellum complete, xiii./xviii. Mcde pore single, 

 •median, %vpon xwii. [xviii. Sp)ermatheccd pore single, median, upon 

 xiii.jxiv. Spermiducal glands tvith tuell-marked narroiv long djuct, 

 each of which joins its fellow to open into fasiform musculctr 

 termincd chamber. No penicd setce. Sper'mathecal sac with two 

 diverticula, which receive oviducts at extremities, and a small narrow 

 musculccr Biorsa propulsoria. 



