DAVID BRYCE ON TWO NEW SPECIES OF PHILODINA. 529 



sluggish in its habits. When feeding, it invariably conceals 

 its foot beneath the hinder part of the body — a habit which 

 gives it an additional appearance of stoutness. The corona 

 (45 /x) is little wider than the collar (40 jx). The sulcus between 

 the pedicels is only moderately wide, and the central portion of 

 the upper lip is slightly concave. In dorsal view the eyes are 

 small and round. The i-ather short and stout foot has spurs 6 /x 

 long, scarcely so slender or so acute as those of P. nemoralis, and 

 the interstice between them is nearly equal to their length. The 

 Stuttgart examples measured 270 fx ; those from Spitsbergen only 

 about 230 /x. My figure represents one of the latter. 



I include in this species two fairly well-marked varieties. The 

 first of these, coriacea, is a rather larger form, and differs from 

 the type in the lesser prominence of the lateral series of skin-folds, 

 the obliteration of the dorsal series, and the absence of the 

 sinuous and roughened ridges so conspicuous in typical examples. 

 The skin of the trunk is profusely shagreened, reddish -brown, 

 and rather opaque. The spurs in this variety are about 9 fx 

 long, and the interstice between their bases is slightly convex, 

 with a distinct central notch. A series of specimens were found 

 in liverworts taken from a tree near Sandling Junction, Kent, 

 in 1896. 



The other variety — callosa — was really met with before the 

 others, one or two specimens having been found in moss brought 

 to me by my niece from Baden in 1893. These specimens, like 

 others since examined, showed no trace of eyes, and were there- 

 fore judged to belong to the genus Callidina. I detected the 

 eyes, however, in some specimens found at Slindon, Sussex, in 1895. 

 In more recent years I have had this form from Edge Hill, 

 Warwickshire, Norton's Heath, Essex, and from Hollingbourne, 

 Kent, nearly always in liverworts. Mr. James Murray has found 

 it not only in the same plants, but also in the open water of a 

 Scottish loch. This variety would thus seem to be the most 

 widely distributed in this country, but I have rarely met with 

 more than one or two individuals at a time. 



It is nearly intermediate between the typical ruyosa and the 

 variety coriacea. In general style it resembles the latter ; but 

 the skin-folds are faintly ridged and transversely wrinkled, and the 

 skin less distinctly shagreened. The colour is pale yellowish - 

 red or faintly greenish. In size it resembles the type form, and 



JouRN. Q. M. C, Series II. — No. 53. 36 



