The BcUlluid Rolifcra of the Forth Area. 219 



P. rugosa, Bryce (4). 



Among Sphagnum, Bavelaw Moss, near Balerno, February. 



P. fiaviceps (Bryce, MS.). 



This species, which will be described by Mr Bryce at an 

 early date, was first discovered in the Forth Valley. Mr 

 Bryce found it in some Lemanea sent to him from Loch 

 Vennachar, on the occasion when Microdina was discovered. 

 It is now known to be extremely common, especially in pure 

 streams and lake margins in Scotland, but, so far as I am 

 aware, has not been reported elsewhere. 



In moss from stream, Torduff; Lothian Burn, March; 

 Nether Habbie's Howe; Upper Elf Pond; Dundas Castle, 

 June ; Winchburgh and Aberfoyle, December ; abundant on 

 seaweed, Morrison's Haven, November. 



P. nemoralis, Bryce (4). 



Koslin Glen, March ; Duddingston Loch ; Torduff; Lothian 

 Burn ; Ochils, behind Dollar, June. 



P. brevipes, Murray (11). 



The type of this somewhat variable species has only been 

 observed in the district at the Upper Elf Loch, Braid Hills, 

 but a curious variety was found at Midcalder, which I include 

 provisionally under P. hrevijpes, though in some respects it is 

 intermediate between that and P. citrina. (Plate YII. Fig. 

 1, a to c.) 



The general form is that of P. brevipes, which is a much 

 less massive animal than P. citrina, and the upper lip is 

 exactly similar. It differs in having a distinctly four-jointed 

 foot, and in lacking the very long setse on the rostrum. 

 Eesembling P. citrina in the four-jointed foot, the pointed 

 Qgg, and the spurs, it differs in the form of the upper lip, less 

 massive trunk, lack of yellow colour, etc. 



From both species it differs in some important particulars. 

 The eyes are very minute dots. Both species have large 

 eyes, P. citrina very large. The trunk is covered by a 

 coating of dirt, as is normally the case with Callidina 

 {Rotifer) longirostris and some other species. This in- 

 dicates that there is a viscous secretion on the skin, and 



