60 W. MILNE ON THE 



are practically parallel — the width at the ankle being 4*5, and 

 across the spur points 5. A straight interspace, nearly half the 

 width of the spur base, separates the short spurs, which are rather 

 less in length than the width of the ankle. For a very short dis- 

 tance from the interspace, the inner border of the spur proceeds 

 parallel to the outside edge, and then diverges straight to the apex. 

 I have frequently seen the spurs clipped together in an inward 

 direction, but have never observed the points farther apart than 

 the normal. The spur segment is continued well back from the 

 spurs to the toes. Very noticeable is the difference in size of the 

 toes (fig. 56), the front ones having at least twice the diameter 

 of the back ones, and being much longer. About the middle of 

 the toes, the diameter is greatest, and from there they narrow 

 slightly to the extremities, which are terminated by peculiar 

 cylindrical brushes. Muscular threads proceeding upwards from 

 the toes are seen very distinctly. 



The trunk is widely plicate. 



Young specimens have seldom any yellow colour. 



P. fraelonga can be kept for a considerable time in the bottles, 

 provided the water is renewed frequently ; and the eggs hatch 

 out. They do not seem to remain long healthy in an ordinary 

 slide. 



Habitat. — Draaifontein farm ravine, along with M. falcatus ; 

 also abundant in some of the pools in the larger ravine below. 



Philodina grandis sp. no v. 



PI. 3, figs. 3-3^. 



Specific Characters. — Body long and stout ; bright yellow in 

 trunk, but paler towards extremities. Corona very large and 

 widespread, equal to well over one-fourth of the fully extended 

 animal. The sulcus is nearly as wide as the disc. A stout peg 

 on each wheel carries at least three setae. Rostrum stout, with 

 trifid lamella. Antenna long and stout, equal to one-half of neck 

 width. Jaws very large, heart-shaped with four very large teeth 

 and one smaller. There are no eye-spots. Foot is long and fairly 

 stout. Spurs narrow and equal to width of ankle, with narrow 

 convex interspace. Two of the toes are very large. Trunk and 

 rump are very closely stippled. Size, l/50th inch with frequent 

 samples up to l/40th inch. 



