90 MR. B. C. PU1TNETT on [May 21, 



defined ; axilla? and groins whitish. Shoulders darker rufous, this 

 colour darkening downwards on the fore limb until at the knee 

 (and probably thence to the hoof) it is blackish brown. Hind 

 limbs similarly deep chestnut rufous on the thighs, changing at the 

 hocks to black or blackish brown. Tail short, only about two 

 inches in length * ; above black, more or less grizzled with rufous 

 and white, below and at the extreme tip grizzled white. 



In all probability this handsome Duiker is most nearly related to 

 the West-African O. nigrifrons Gray, but differs in its thicker and 

 more woolly hair, deeper and more uniform general colour, and by 

 the greater extent of the black on the hind feet. 



Hub. Ruwenzori district. 



Tvpe a flat skin, without head, purchased from the natives. 

 B.M. No. 1.8.9.65. 



KOBUS THOMASI Scl. (?). 



A single native skin from the Semliki Valley is marked in an 

 unusual and striking manner with grey, so symmetrically arranged 

 that it has been supposed to represent a new species. 



But without further material I am not prepared to give in my 

 adhesion to this view, and would rather suggest that the grey marking 

 is due to senility, just as domestic dogs and other animals occasion- 

 ally turn grey in patches. I would freely admit that I know of no 

 such striking case as the present ; but as the skin agrees in all 

 other respects with one from approximately tbe same region 

 brought home by Mr. Scott Elliot, and of the usual fulvous colour, 

 I do not at present feel justified in describing Sir H. Johnston's 

 specimen as a distinct species. 



2. On some Arctic Nemerteans. By R. C. Punnett, B.A. 2 



[Received April 20, 1901.] 



(Plates VI. & VII. 3 ) 



(Text-figures 1-6.) 



The Nemerteans described below formed part of the collection 

 in the Museum of University College, Dundee, and were kindly 

 handed to me for examination by Prof. DArcy W. Thompson, 

 after whom I have much pleasure in naming one of the new forms. 

 I have been able to refer two to species already known, whilst five 

 other forms are new, viz. : — AmpJnporus ihompsoni, A. arcticus, 

 A. paulinus, Drepanophorus borealis, and Cerebratulus c/reenlaadicus. 

 It is worthy of note that whilst the Metanemerteans, and especially 

 the genus Amjyhipoms, are well represented, only two specimens 

 of Heteronemerteans, belonging to the same species, were found. 



1 Although not obviously imperfect, it is possible that the tail has been 

 broken and healed in life. 



3 Communicated by Dr. S. F. Haumer, F.Z.S. 

 :t For explanation of the Plates, see p. 106. 



