149 



ON THE BDELLOID ROTIFERA OF SOUTH AFRICA. 



PART II. 

 By W. Milne, M.A., B.Sc, F.R.S.E. 



{Read October 24:th, 1916.) 



Plates 10-14. 



In a footnote * to Part I of this paper I stated that I had in- 

 advertently made use of a generic name (Monoceros) in the 

 description of a new Bdelloid genus, which was already pre- 

 occupied and therefore inadmissible. 



I propose here to change the generic name Monoceros, with 

 its derivatives Monocerotidae and Monoceros falcatus, into 

 Henoceros, Henocerotidae and Henoceros falcatus. 



In Part I, pp. 77-82, I gave descriptions of three new species 

 of the genus Macro trachela, and shall now complete my list : 



Genus MACROTRACHELA. 



Macrotrachela verecunda sp. no v. 

 PI. 10, figs. 1-lc. 



Specific Characters. — Of small size. Trunk dark brown and 

 deeply ridged. Rostrum long and very narrow, with double 

 lamella. Antenna long and stout, equal to fully three-fourths of 

 neck width, and bearing long setae. Teeth two. Foot short 

 with narrow ankle and three stumpy toes. Spurs not very long, 

 of a distinctive shape. Corona equal to collar in width. Sulcus 

 very narrow. A slow creeper. Size, 1/1 20th inch. 



This is a very small animal with a dark brown trunk and very 



hyaline neck and foot. The trunk has uneven coarse ridges, 



giving it an appearance resembling the surface of the rough bark 



of a tree. The skin must be viscous, as fragments of the debris 



* Journ. Q.M.C., ser. 2, vol. xiii. p. 49. 



