[ 25 ] 



RUWENZORI EXPEDITION REPORTS. 



3. VEEMES.* 



5y Frank E. Bbddaed, M.A., F.R.S., F.Z.S. 



Received April 9, read April 23, 1907. 



[Text-figures 3-8.] 



The following pages relate to a number of species of EudrilidBe collected by the 

 Ruwenzori Expedition which I received from the Natural History Museum through the 

 kindness of Mr. W. R. Ogilvie-Grant. They were collected upon Mt. Ruwenzori along 

 with a number of other species of Oligochseta belonging to the genera Benhamia and 

 Alma. These latter genera have been lately investigated by Signor Oognetti de Martiis f , 

 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 expedition ; but, so far as 

 I am aware, they have not 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. 



Suborder OLIGOCH^TA. 



PoLTTOEEUTUS EUWENZOEii Beddard. 

 Polytoreutus ruwenzorii Beddard, P. Z. S. 1907, p. 415. 



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 hitherto known have been described by 

 Michaelsen J. This group — which includes the species P. kirimaensis, P. usindjaensis, 

 and P. sylvestfis — 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 §, in the existence of paired copulatory pouches debouching to the exterior on 



* Mr. Beddard's Memoir is reprinted from P. Z. S. 1907, pp. 415-431. 

 t Boll. Mus. Zool. Torino, vol. xsi. notes i. and iii. ; vol. xxii. note xiv. 

 X " Eegenwiirmer," in Deutsch-Ost-Afrika, 1896. 

 § Apparently not in P. usindjaensis. 



VOL. XIX. — PAET I. No. 4. — October, 1909. e 



