170 ANNALS OF SCOTTISH NATURAL HISTORY 



and narrow ; surface smooth ; zygospore orbicular and 

 smooth. Length, 22 /x; breadth, 20 ^ ; isthmus, 8 ^ ; 

 diameter of zygospore, 30 /JL. (Our Plate II. fig. 13.) 



This species was first found in Ireland, by Mr. Archer 

 many years ago. Very rare. Aberdeen Powlair (Birse), 

 Heughhead (Aboyne), Homehead (Cromar). 



103. C. oligogongrns, Reinsch. 'Very rare. Kincardine Glen 



Dye, above the Shooting Lodge. 



104. C. orbiciilati/in, Ralfs. Not common. Inverness, Aberdeen, 



Kincardine, Forfar, Perth, Argyle. 



105. C. ornatitm, Ralfs. General. 



1 06. C. orthostichum, Lundell. Not uncommon in South Aber- 



deen and North Kincardine, but rare elsewhere. Forfar 

 in Glen Clova ; Perth at Buchanty ; Argyle near 

 Kingshouse. 



/3 pumiluin, Lundell. -- Rare. Aberdeen Slewdrum, 



Forest of Birse, Dawin, Dalbagie, Glen Clunie near 



Castleton ; Kincardine Kerloch and Bishop's Dam ; 



Forfar Glen Clova ; Perth Spital of Glen Shee ; 



Argyle near Kingshouse. 



107. C. ortogomnn, Delp. Very rare. Stirling Fintray Hills (Mr. 



Croall). 



1 08. C. ovale, Ralfs. Aberdeen -- Khoil ; Perth Ben Lawers, 



Craig-an-Lochan. 



109. C. pachydernnun, Lundell. Rare. Sutherland near Loch 



Inver ; Ross Falls of Rogie ; Aberdeen Slewdrum, Birse- 

 more, and Heughhead near Aboyne, Dalbagie, Loch- 

 nagar; Kincardine Cammie and Glen Dye; Stirling 

 Fintray (Mr. Croall) ; Argyle near Kingshouse, and in 

 Mull. 



j3 minus, Nordst. Rare. Ross Poolewe ; Inverness 

 near Brin (Mrs. Farquharson) ; Aberdeen Gight, at 

 the Break Neck Fall (Glen Callater) ; Forfar Can- 

 lochan ; Perth - - Rannoch (Dr. F. B. White) ; 

 Stirling Alva Glen (Mr. Croall). 



1 1 o. C. Palangula, Breb. Rather rare. Ross Poolewe ; Inver- 

 ness^near Brin (Mrs. Farquharson), in Skye near Loch 

 Coruisk ; Aberdeen and Kincardine not uncommon ; 

 Forfar Lundie Bog and Glen Dole; Perth Methven 

 Moss, Birnam, Rannoch; Dumbarton -- between Lochs 

 Long and Lomond ; Argyle near Kingshouse and Oban. 



in. C. parvulum, Breb. Rather rare. Sutherland Loch Inver ; 

 Ross ; Inverness Brin and Skye ; Aberdeen Slewdrum ; 



