162 W. MILNE ON THE 



Habrotrocha alacris sp. nov. 

 PL 12, figs. 14-14a. 



Specific Characters. — Very small and narrow ; hyaline. Ros- 

 trum long and narrow, Avith double lamella. Antenna stout, 

 about three-fourths neck width. Jaws large with two large 

 teeth. Rump distinctly marked off from the trunk. Spurs short 

 cones. Corona is wider than collar. Seta on pimple on each 

 wheel. Sulcus equal to half the width of wheel. Upper lip a 

 small rounded segment on a flat curve. Size, 1/1 20th inch. 



This little animal creeps fairly fast, but steadily and without 

 slithering. It assumes very graceful curves when feeding. 



The dental bulb is large, and with its muscular investment 

 takes up, practically, the whole width of the segment. The 

 two teeth are also quite large. The trunk is very plicate. There 

 is a distinct marking oft' of the anal and pre-anal segments from 

 each other and from the trunk. The intestine is large and 

 elongated, but the contractile vesicle is small. Spurs are equal 

 to the ankle width, divergent and without interspace. 



The corona is fully one-fourth wider than the collar, and the 

 pedicels are very long, so that the general appearance of the 

 corona is a little like that of H. eremita or H. acornis ; only the 

 distance between the pedicels inside does not increase upwards, 

 and the distance from the sulcus bridge to the top of the corona is 

 comparatively greater. There is a small round knob — not a 

 ligule — on the sulcus bridge. The semicircular upper lip rises 

 just up to the sulcus bridge ; and the collar, above which there 

 is a lateral expansion, shows very prominently. 



Habitat. — Ground moss, Springfield, Uitenhage district. Not 

 common and found only in moss from the one place. 



Habrotrocha elusa sp. nov. 



PI. 11, figs. 9-9a. 



Specific Characters. — Of moderate size, rather stoutly built 

 but not swollen looking ; keeps its shape well. Of a brownish 

 to dark lemon-yellow colour. Rostrum stout, lamella double 

 and prominent. Antenna short, equal to one-third neck width. 

 Teeth six. Skin smooth and thick. Shape of rump and first 

 segment of foot very characteristic and constant. Spurs two 



