176 ANNALS OF SCOTTISH NATURAL HISTORY 



159. C. substriatum, Nordst. Very rare. Perth Craig-an-Lochan. 



1 60. C. subtitiiiiduin, Nordst. Very rare. Sutherland Loch Inver; 



Ross Poolewe, Falls of Connon ; Inverness Brin ; Perth 

 Spital of Glen Shee, Craig-an-Lochan; Kirkcudbright 

 New Galloway. 



1 6 1. C. snbnndulatuin, Wille. Probably not uncommon. Ross- 



View Rock, near Strathpeffer ; Inverness Brin ; Aberdeen 

 Upper Powlair, Slewdrum ; Argyle near Kingshouse. 



162. C. sitpraspeciosum, Wolle. Very rare. Perth Ben Lawers. 



163. C. tatricuin, Recib. Very rare. Ross Poolewe (Rev. D. 



Campbell). 



164. C. tetrachondruni, Lundell. Not common. Not uncommon 



in Ross, Banff, Aberdeen, Kincardine, Forfar, and Perth. 

 It occurs in Argyle, near Kingshouse. Not observed in 

 other counties. 



Conjugated on Deeside, in a marsh between Loch Kinnord 

 and Cambus-o'-May. Zygospore small, smooth, and globular, 

 sometimes showing a tendency to elongate irregularly. 



165. C. tetragonum (Nasg.), Archer. Aberdeen Corrie Kandor. 



Forma Lundell. Rare. Aberdeen Birsemore, Heugh- 

 head, Morven, Presswhin, Glen Callater ; Kincar- 

 dine coast near Portlethen, Palely Hill ; Forfar 

 Balquhadly Hill in Fern, Reeky Linn ; Perth -Glas 

 Mhoel, Durdie Moor, Rannoch, Bracklin ; Argyle 

 near Ardrishaig in Mull ; Kirkcudbright New 

 Galloway. 



1 66. C. tetraophthalmum (Kg.), Breb. General. 



(3 Ln/idcllii, \Vittr. Probably not uncommon. Ross 

 Poolewe; Aberdeen Haughton, Heughhead near 

 Aboyne ; Kincardine Cammie, Skatey shore near 

 Stonehaven ; Stirling Fintray Hills. 



167. C. Thwaitesii, Ralfs. Not common. Aberdeen Scotston 



Moor, Powlair in Birse, Dalbagie, Castleton, Glen Callater ; 

 Kincardine Cammie, Dalbrake ; Forfar Rescobie ; Perth 

 Durdie, Birnam, Athole Forest, Ben Lawers. 



1 68. C. tinctuin, Ralfs. Probably general. Has not been observed 



in Caithness, Nairn, Stirling, and Renfrew. Seems rare at 

 high altitudes. 



Conjugated in Aberdeen at Slewdrum, and between Loch 

 Kinnord and Cambus-o'-May ; in Kincardine, at Dalbrake. 



169. C. trachypleurum, Lundell. -- Extremely rare. Aberdeen 



Scotston Moor. 



