172 ANNALS OF SCOTTISH NATURAL HISTORY 



view can hardly be accepted ; for, in the first place, 

 Brebisson founded, or at least published, this species 

 several years after Ralfs' work was issued, and therefore 

 must have known well what forms Ralfs included under C. 

 margaritiferum ; and secondly, C. prcemorsum is described 

 as having the ends emarginate, which Ralfs' form has not. 

 Indeed, C. prcemorsum is more nearly related to C. Botrytis 

 than to C. margaritiferum, or rather the form in question 

 so named by Ralfs, which is really a very different thing 

 from C. margaritiferum proper. 



1 1 9. C. prominulum, Racib. Very rare. Ross Poolewe ; Inver- 



ness Brin. 



120. C. protractum (Nag.), Archer. Extremely rare. Aberdeen- 



Tableland above the head of Glen Callater. 



121. C. protuberans, Lundell. Very rare. Aberdeen Bottomend 



near Aboyne. 



122. C. pseudobiremum, Boldt. Very rare. Aberdeen foot of 



Birsemore, near Aboyne. 



123. C. pseudoconnatum, Nordst. Rare. Aberdeen Tomachar 



and Dawin in Cromar, Dalbagie near Ballater; Kirkcud- 

 bright New Galloway. 



1 24. C. pseudonitidulum, Nordst. Not common. Orkney, Suther- 

 land, Ross, Inverness, Aberdeen, Kincardine, Forfar, Perth, 

 Argyle, Arran. 



125. C. pseudoprotuberans, Kirch. Very rare. Inverness Loch 



Ruthven and Clachan (Mrs. Farquharson). 



Var. alpinum, Racib. - - Very rare. Aberdeen small 

 pool north side of Loch Dawin, Cromar. 



126. C. pseudopyrainidatiuii, Lundell. Not common. Sutherland, 



Ross, Inverness, Aberdeen, Kincardine, Forfar, Perth, 

 Dumbarton, Argyle, Arran. 



Sub. sp. stenonotum, Nord and Wittr. Ross Poolewe; 

 in many places in Aberdeen and Kincardine ; Argyle 

 Ben Laoigh ; not observed elsewhere. 



127. C. pulcherrimiiin, Nordst. Very rare. Forfar in Canlochan. 



128. C. piinctulatiim, Breb. Very rare. Aberdeen near Dinnet, 



and pool west side of Loch Dawin; Fife --near St. 

 Andrews ; Perth - - in Glen Garry, near Dalnacardoch. 

 Length, 26-29 /z ; breadth at base of semi-cell 27-2 //, ; do. 

 end, 1 6 /^ ; isthmus, 9-6 /z. 



129. C. pusillum (Breb.), Archer. Rare. Inverness near Loch 



Coruisk, in Skye ; Aberdeen near Birse Church ; Cairnton 

 Moss, near Aboyne, Homehead in Cromar ; Kincardine 



