64 w. MILNE On the 



the refractive, muscular, thick, fleshy integument, the deep 

 plicae, and the small oil globules in the stomach investment. 

 There are also minute round particles, like those so common in 

 Floscularia, floating in the perivisceral fluid and streaming with 

 every movement of the body. These often collect at parts and 

 cause a reddish-brown appearance. 



The rump is fairly long, but the anal and pre-anal segments are 

 not well marked off from each other ; the lumbar plicae, however, 

 give some idea of how far the pre-anal segment extends (PI. 3, 

 fig. Sd). The intestine and contractile vesicle are thick- walled, 

 but not particularly large for the size of the animal. Heavy 

 foot glands and muscles penetrate through the anal segment ; 

 and two curious muscles seen over the contractile vesicle (fig. 3d) 

 are apparently part of it, as they are pushed on to each other as 

 the vesicle contracts. 



The foot is longer than usual in the moss-dwelling Philodinae. 

 There are four segments, through which pass two great glands and 

 strong muscles. The spurs are characteristic, the interspace is 

 slightly convex and equal to the width of the base of the narrow 

 spur. The length of the spur is equal to the width of the segment 

 at the point of attachment, but the spurs are attached not to the 

 widest part of the segment, as is usual, but below it. I have 

 never seen the form which has spurs exactly like M. russeola 

 as figured by Murray. The toes are not far separated, the front 

 two are enormous, and the other two much smaller. Cord muscles 

 from each toe are very distinct, whether taut, or slack in loops. 



The body is stippled in the most delicate and beautiful way. 

 The stipples are exceedingly small and are arranged in rows so 

 close together that, viewed at certain angles, as against the inside 

 of a ridge, these rows look like delicate striae on a dental bulb. 

 When the surface is viewed at right angles, the stipples are seen 

 to be minute dots arranged in rows excessively close together. 

 When the focus is slightly lowered, the appearance is that of 

 hollows or tiny cells, and lower still the dots reappear. The 

 middle focus — in good specimens — gives a brilliant effect, the 

 perfect similitude of a miniature honeycomb whose cells have 

 been reduced to almost infinitesimal dimensions. The stippling is 

 difficult to make out on some specimens, but in general it is 

 quite easy. Occasionally it can be seen most brilliantly on a 

 dead shell or skin. 



