1907.] ON NEW WORMS OF THE FAMILY EUDRILID^. 415 



3. On some new Species of Earthworms of the Family 

 Eudrilidce, belonging to the Genera Polytoreutus, Neu- 

 manniella, and Eininoscolex, from Mt. Ruwenzori. By 

 Frank E. Beddaed, M.A./f.R.S. 



[Received April 9, 1907.] 



(Text-figm^es 122-127.) 



The following pages relate to a numbei- of species of Eudvilidfe 

 Avhich I received from the jSTatural History Museum through the 

 kindness of Mr. W. R. Ogilvie-Grant, F.Z.S. They Avere collected 

 upon Mt, Ruwenzori along with a number of other species of 

 Oligochfeta belonging to the genera Benhamia and Alma. These 

 latter genera have been lately investigated by Signer Oognetti de 

 Martiis*", upon material collected by H.R.H. the Duke of the 

 Abruzzi from the same locality. I have therefore limited myself 

 to the description of the Eudrilidse, of which specimens must, I 

 should presume, have been collected by the Italian exjjedition ; 

 but they have not, so far as I am aware, up to the present been 

 described. All the species are new, but are referable to genera 

 already defined, which genera are in every case East African in 

 range. 



Polytoreutus ruwenzorii, sp. n. 



Of this species the collection contained but a single example, 

 and that in a not very good state of preservation for dissection, 

 I have, however, been able to ascertain, as I think without doubt, 

 that the species is new and allied to a small group of species of 

 this genus of which all the members known hitherto have been 

 described by Michaelsen f. This group — which includes the species 

 P. kirimaensis, P. usindjaensis, and P. sylvestris — is limited to the 

 shores of Victoria Nyanza, Albert Nyanza, and the neighbouring 

 country ; and the occurrence therefore of an ally upon Mt. 

 Ruwenzori is not surprising. The likeness of these four forms is 

 to be seen chiefly in the peculiar relations of the diverticula of the 

 spermathecal pouch and, in three of them at any rate J, in the 

 existence of paused copulatory pouches debouching to the exterior 

 on either side, and independent, of the penis. The present species, 

 whose exact locality within this area I fix by means of its specific 

 name, is represented by an example quite fully mature which 

 measures 77 mm. in length by 5-6 mm. in breadth. It is thei'e- 

 fore a stoutish but also shortish worm. 



The setce of Polytoreutus ruwenzorii are disposed like those of 

 other species of the genus : %. e. the ventral setae are much wider 

 apart than the lateral setae. The distance between each seta of 

 the ventral pair is something like three times that which separates 



* Boll. Mus. Zool. Torino, vol. xxi. notes i. and iii. ; vol. xxii. note xiv. 

 t " Regenvviirmer," in Deutscli-Ost-Afrika, 1896. 

 J Apparently not in P. usindjaensis. 



28* 



