72 , W. MILNE ON THE 



in squarisli jaws. Corona rather wider than collar. Collar has 

 flap extensions. Upper lip has a wide front gently sagging in 

 the middle. Size, l/90th inch. 



Its habits when feeding are similar to those of P. inopinata, 

 but if anything more provoking. The corona is rather wider, but 

 the upper lip is more difficult to see, on account of its less sharp 

 outline and its greater transparency. It rises about one-third 

 up the sulcus. The rostrum is not very large, and the double 

 lamella is far from prominent. The eye-spots are brilliant, 

 somewhat elongated, and set rather closer together than those 

 of P. inopinata. 



The spurs are equal in length to the ankle width, and narrow 

 to a sharp point, while the interspace is equal to the width of the 

 spur base. Towards the points, the spurs curve upwards slightly 

 but distinctly, a very uncommon occurrence. 



It has a habit, when creeping, of throwing itself backward head 

 over heels, with the four toes fully extended and gripping. Some- 

 times the two back toes are seen extended alongside and almost 

 parallel to the spurs, and seem to be nearly as long (PL 4, fig. 7). 

 All four toes are pointed. 



This variety seems hardier than P. inopinata as it persists in 

 the water and on the slides after the latter has died out, but loses 

 much of its energy after a few hours on the slide. 



Habitat. — Draaifontein farm ravine pools. Fairly abundant. 



Philodina patula sp. nov. 



PL 5, figs. 11-lla. 



Specific Characters. — Stout, but not of great length. Colour 

 lemon yellow, but only the merest tinge. Antenna equal to 

 two-thirds neck width. Jaws not very large ; teeth, two. Brain 

 mass large, but no eye-spots. Lumbar region not heavy. Foot 

 fairly stout, of four segments. Spurs parallel, very short, and 

 without interspace. Corona very wide — almost twice collar 

 width ; sulcus rather wider than disc. Upper lip with a slight 

 indentation. Size, l/80th to l/75th inch. 



This is a vigorous animal and a very free feeder. The rostrum 

 is long and stout, with a double lamella, and carries several long 

 setae. The antenna is long and has a considerable tubular hollow 



