160 W. MIlNE ON 'THE 



There is a large and round intestine, and the contractile vesicle 

 is rather small and of short period. The short foot consists of 

 three segments. Spurs are of moderate length, slightly shouldered 

 on the outside at the roots, and then proceed downwards with a 

 slight convex curve. They are not divergent. 



The corona is a very pretty one, with strong cilia which play 

 to a considerable extent into the great oral entrance. In some 

 views it reminds one of some lily in bloom with its long stalk and 

 bulb ; the long rostrum and antenna standing out well, almost at 

 right angles, contribute to the elegant outline. The corona is 

 to the collar as 9 to 6 and is much inclined ventrally. When the 

 neck is bent dorsally, till the plane of the wheels is horizontal, 

 the ventral view shows the great oral entrance-spout standing 

 straight up, and well above the level of the wheels (PI. 11, fig. 8b). 

 This large spout-like mouth is very similar to that of H. angustu 

 collis (2). 



The upper lip is a thin -looking, glassy, laminate plate, rising 

 well up, broad and curving slightly outwards, and crowned with 

 a flat triangle. 



When the neck is bent, rings are formed simulating joints, and 

 even in the rostrum a false joint may appear. When the animal 

 is contracted into a ball, the head is seen attached to the front 

 of the trunk by about a score of delicate muscular threads, 

 parallel and stretched like piano strings. 



A yellow case was seen frequently, and only where this animal 

 was found ; empty, except in one instance when there was an egg 

 inside. I did not see it hatch out, but soon after it did I found 

 a half-grown specimen on the slide, which I had not observed 

 before, and which probably came from the egg. The case is 

 almost round in shape, and has no neck. It has a hard thin wall 

 with granules in it, and there are about a dozen rings or bars 

 projecting on the inside, looking like lines of latitude on a globe. 



Habitat. — Draaifontein farm ravine pools. Found in fair 

 numbers, on different occasions, but only from the one place. 



Habrotrocha valida sp. nov. 

 PI. 13, figs. 16-16a. 



Specific Characters. — Of small size, short and very stoutlv 

 built. Hyaline in colour, but older ones occasionally have the 

 stomach coating slightly brown. Eostrum short and thick; 



