1907.] WORMS OF THE FAMILY EUDRILID.E. 423 



seems to be considei'ably less than in P. sylvestris, where they 

 extend very much further back in the body. As in that species, 

 however, the spermathecal diverticulum on each side receives or 

 emits the duct leading to the exterior from the side and not from 

 the end. The relationships of the diverticulum to the thread- 

 like regions of the s^jermathecal sac which enter and leave it were 

 precisely like those depicted by Michaelsen for P. sylvestris, and 

 not like those of P. kirimaensis ; for in the latter species the 

 spermathecal diverticulum simply bifurcates at its end into the 

 incurrent and excurrent regions of the spermathecal sac. 



The above account of the anatomy of Polytoreutus granti 

 shows that it cannot be confused either with the species which 

 I have just described or with any other known form. It 

 comes nearest to P. ruweiizorii and to P. sylvestris. It differs 

 most markedly from P. ruioenzorii by the characters of the 

 spermathecal diverticula, and by the great length of the anterior 

 undivided portion of the spermathecal sac. It differs from 

 P. sylvestris mainly in the presence of a well-marked circular 

 chamber at the end of the undivided spermathecal sacs, and by 

 the shorter spermathecal diverticula and sjoermiducal gland. It 

 may be thus defined : — 



Polytoreutus granti. 



Length 70-80 mm. ; breadth 4-5 inmj. Distance between setce. 

 of ventral pair three times that betioeen setce of lateral pair. Male 

 pore xvii./xviii., S2)ermathecal pore xviii./xix. Spermathecal sacs 

 long and mtich coiled in undivided anterior region; j^osterior 

 diverticida of some length. Oviduct betvjeen spermaihecal sacs and 

 receptacxdum ovorum not long. Right sperm-sac longer than left. 

 Spermiducal glands furroioed ; duct arising before proxim^al end of 

 gland. Coptdatory chambers present. 



Neunianiiiella ruwenzorii, sp. n. 



I refer two fully mature, moderately large individuals, as well 

 as a number of smaller specimens, of an earthworm, apparently 

 new to zoology, to this ^&i\ViSi Neuinanniella* ., for reasons which 

 the following account of its structure will render plain. The 

 princijDal distinguishing feature of the genus is thus described by 

 its founder, viz. : — " Die fur mehrere neue Arten aufgestellte 

 Gattung Neumanniella unterscheidet sich von den vei'wandten 

 Gattungen Eininoscolex., Gardidlaria und Telendrilus durch die 

 vollstandige Unpaarigkeit der Samentasche." This is plainly to 

 be seen in Neumanniella ruivenzorii. The larger of the two 

 examples is 105 mm. long and measures 3 mm. in diameter. It 

 is not strongly pigmented. The 2^^'ostomium is very small and 

 retracted within the peristomial segment. 



The setce have the usual arrangement met with in this genus. 

 The individual setae of the vential pair are much wider apart 



* Micliaelsen, " Die Oligochfeteii Nordost-Afrikas," Zool. Jahrb. (Abth. f. Syst.) 

 xviii. p. 501. 



