ON SCOTTISH DESMIDIE/E 171 



Kincardine Cammie, Muiryhaugh, Dalbrake, Glen Dye ; 

 Argyle near Kingshouse and Ben Laoigh ; Fife. 



112. C. pcrforatutn, Lundell. - - Very rare. Inverness - - Loch 



Ruthven (Mrs. Farquharson) ; Aberdeen - - Dalbagie and 

 Loch Ullachie near Ballater, Birsemore, near Castleton 

 (Brae mar). 



113. C. Phaseolus, Breb. -- Pretty common. Ross, Inverness, 



Aberdeen, Kincardine, Forfar, Perth, Argyle, Arran, Fife, 

 Kirkcudbright. 



fi elevatu/n, Nordst. Rare. Aberdeen near Ballater, in 

 Glen Muick; Kincardine -- Glen Dye; Perth- 

 Rannoch. 



y achondrum, Boldt. Very rare. Inverness near Loch 

 Coruisk in Skye. 



114. C. pUcatiun, Reinsch. Rare. Ross; Inverness Brin (Mrs. 



Farquharson) ; Aberdeen - - Brimmond, Dalbagie ; Kin- 

 cardine -Pitreddie and Curran (Strachan) ; Perth Methven 

 Bog. 



Var. majits, Reinsch. (?) Length, 87-92 p; breadth, 

 48-50 p; isthmus, 22 /z. (Our Plate II. fig. i.) 

 Very rare. Aberdeen Powlair, Birse ; Kincardine 

 Scolty near Banchory. 



Var. Scoticuin, n. var. Sides hollowed ; ends straight or 

 slightly drawn out ; cell walls very thick and closely 

 punctate. Length, 57-67 /z ; breadth, 38-40 //. ; 

 isthmus, 22-25 I J - (Our Plate II. fig. 2.) Exceed- 

 ingly rare --a rupestral species. Aberdeen The 

 Vat, Presswhin (Cromar). 



115. C. polygonum, Nag. (Enastritm, Nag.) - - Not common. 



Sutherland, Ross, Aberdeen, Kincardine, Forfar, Argyle, 

 Fife. 



1 1 6. C. Portianum, Archer. General. With zygospores at Brim- 



mond, Aberdeen, agreeing with D. Bary's fig. " Conjugatae." 

 Taf. VI. fig. 50, given under C. orbiculatuin, Ralfs. 



117. C. praegrande, Lund. Exceedingly rare. Perth Spital of 



Glen Shee. 



1 1 8. C. pra/iwrsii/n, Breb. This species, if we understand it aright, 



must be extremely rare. It occurred in a gathering made 

 near Tillypronie, Aberdeen, a good many years ago. 

 Perth Glen Shee ; Argyle Ben Laoigh. 



Mr. Archer, whose judgment in such a matter is entitled 

 to the greatest respect, supposed that probably this species 

 might be the same as that given by Ralfs, "Brit. Desmid.," 

 Plate XXXIII. fig. 6, under C. margaritifcrum. But this 



