76 W. MILNE ON THE 



the pre- anal segment. The spurs are convex on the outer borders 

 and slightly divergent. There is a nick cut out in each inner 

 border, and a bold convex interspace separates the spurs. 



The corona is not wide, and not quite to collar as 5 : 4. Two 

 membranes from the wheels come down into the sulcus, which is 

 about two-thirds of the disc width. The upper lip is very difficult 

 to trace, on account of its faintness, the refringent matter below 

 and the rostrum generally overlying it. The restless waving 

 motion also adds to the difficulty. 



Habitat. — Ground moss, Salisbury, Rhodesia. Abundant in 

 the one very small piece of moss I got from Salisbury. I have 

 not seen it from anywhere else. It is very prolific. Along with 

 this were two other species which had practically the same spurs ; 

 one a variety of M. quadricornifera, and the other a variety of 

 M. musculosa. 



Philodina scabra sp. nov. 

 PL 6, figs. 13-136. 



Specific Characters. — Of extremely small size, short and stout ; 

 of no distinctive colour. Trunk roughly furrowed, of gnarled 

 bark-like aspect. Skin of trunk is evidently viscid, as particles 

 adhere to the trunk. Corona narrower than collar, sulcus ex- 

 tremely narrow. Upper lip a flat curve with a small fleshy sharp 

 peg-like protuberance in the middle. Antenna is equal to about 

 one-half neck width. Foot short with four segments. Spurs 

 are very distinctive and there are four on the penultimate 

 segment. The dental bulb lies well back, and bears two teeth. 

 Size, l/180th inch. 



This extremely minute animal, in general appearance and in 

 details, corona and foot, looks much more like a species of Macro- 

 trachela than a species of Philodina. I have it, in my notes, 

 included among the Philodina, but have not made a distinct state- 

 ment about the number of toes, as I usually do. I evidently, 

 from my figures, did make out the number, but unfortunately 

 omitted to state it, and as I have not seen the animal since 1908 

 I cannot now remember about the number of toes ; or whether 

 it could have been placed among the Philodina by a slip, though I 

 hardly think so. When the number of its toes is next made out, 

 it may mean transfer to Macrotrachela, 



