PEANK E. BE DDAED— VERMES. 33 



depicted by Michaelsen for P. syhestris, 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. rimenzorii and to P. sylvestris. It differs most 

 markedly from P. rimenzorii 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 spermiducal gland. It may be thus defined : — 



Polytoreutus geanti. 



Length 70-80 mm. ; breadth 4-5 mm. Distance hetvoeen setce of ventral pair three 

 times that between setce of lateral ixiir. Male pore xvii./xviii., spermathecal pore 

 xviii./xix. Spermathecal sacs long and much coiled in undivided anterior region ; 

 posterior diverticula of some length. Oviduct between spermathecal sacs and recep- 

 taculum ovorum not long. Bight spe?'7n-sac longer than left. Spermiducal glands 

 furroived ; duct arising before j^roximal end of gland. Copulatory chambers present. 



Neumankiella ruwenzorii Beddard. 

 Neumanniella ruivenzorii Beddard, P. Z. S. 1907, p. 423. 



I refer two fully mature, moderately large individuals, as well as a number of 

 smaller specimens, of an earthworm, apparently new to zoology, to the genus 

 Neumanniella *, for reasons which the following account of its structure will render 

 plain. The principal distinguishing feature of the genus is thus described by its 

 founder, viz. : — " Die fiir mehrere neue Arteu aufgestellte Gattung Neumanniella 

 uuterscheidet sich von den verwandten Gattungen Eminoscolew, Gardullaria und 

 Teleudril'us durch die voUstandige Unpaarigkeit der Samentasche." This is plainly to 

 be seen in Neumanniella ruwenzorii. The larger of the two examples is 105 mm. long 

 and measures 3 mm. in diameter. It is not strongly pigmented. T\\q prostomium is 

 very small and restricted within the peristomial segment. 



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

 of the ventral pair are much wider apart than the closely paired setse of the lateral 

 pair. The distance between each seta of the ventral pair is fully five times as great as 

 that which separates the two setae of the lateral pair. The setae are rather small. On 

 some segments, at any rate, of the clitellum there are no setae present at all. This is 

 certainly the case with segment xiv., where the exact position of the lateral seta 



* Michaelsen, "Die Oligochseten Nordost-Afrikas," Zool. Jahrb. (Abtb. f. Syst.) xviii. p. 501. 



VOL. XI5. — PART I. No. 5. — October, 1909. f 



