178 • W. MILNE OX THE 



Genus SCEPANOTROCHA Bryce. 

 Scepanotrocha galeata sp. no v. 



PI. 13, figs. 17-17b. 



Specific Characters. — Of very small size ; very slender. Creeps 

 fast with a glide. Narrow rostrum, with single spoon-shaped 

 lamella. Antenna stout, very short, about one-third of the very 

 narrow neck. Dental bulb small, rounded, with four or five 

 teeth. Trunk deeply plicate ; lumbar region long. Foot 

 moderately long, apparently of four joints. Spurs of moderate 

 length, divergent, without interspace. Upper lip a heavy mass, 

 broadest at upper margin. Size, l/130th inch. 



This is another very small species, only likely to be noticed 

 when in a favourable position. The most noticeable feature is the 

 overgro\vn helmet-like upper lip, which is broadest at the upper 

 margin, the front being straight or a very flat curve. Round 

 and towards the front the upper lip is thick. 



The wheels could never be clearly made out. The wheel-whirl 

 is all in front and in a vertical direction. Only a very indistinct 

 or hazy view of the wheels can be got through the flare of the 

 cilia, but they seemed to be very small, possibly about two-thirds 

 of the collar. Only from one view did I get the impression that 

 the wheels were in the usual position. The indications on the 

 whole were in favour of the wheels being at a very considerable 

 angle to the usual position. 



Sometimes there was an appearance as if there were a thin 

 laminate part between the upper lip and the wheels. It is a 

 dapper little fellow, and feeds usually with the neck bent grace- 

 fully, and holding the head well up in a gallant way. When 

 creeping, the neck shows three gentle curves on each side. 



Habitat. — Rock moss, Euphorbia Kloof, Uitenhage. Rare. 



Genus MNIOBIA Brvce. 



Mniobia animosa sp. no v. 



PI. 12, fig. 13. 



Specific Characters. — Of moderate size ; spindle-shaped. Ros- 

 trum fairly stout. Antenna broad, very short, about one-fourth 

 neck-width, with a prominence on each side of it. Front of 

 dental segment wide. Dental bulb small, with three large well- 



