ON SCOTTISH DESMIDIEiE 



255 



colour. Grows apparently in free groups. Length, 12-13^; 

 breadth, 10-12 /j,; isthmus, 6-7 //,. Zygospore, 15-20 p.. (Our 

 Plate II. fig. 14.) 



Very rare. Aberdeen Blackmoss, Craigendinnie, Aboyne; Kin- 

 cardine Cammie in Strachan. 



3. C. pulchdhtm, Breb. Very rare. Aberdeen Aboyne ; Kin- 



cardine Bogandreep in Glen Dye ; Forfar Clova Tableland. 



4. C. Saxonicum, De Bary. Very rare. Kincardine Dalbrake 



and Heughhead in Strachan. 



SUPPLEMENTAL. 



EUASTRUM (Ehr.\ Ralfs. 



(23.) E. oblongum (Grev.), Ralfs. 



Var. cephalophorum, West. Very rare. Perth Spital of 

 Glen Shee (Mr. W. West). 



STA URASTR UM (Meyen), Ralfs. 



2/1. S. amphidoxon, West. Very rare. Kirkcudbright New Gal- 

 loway (Mr. W. West). 



(57.) 6". grande, Bulnh. 



Var. panmm, West. Very rare. Perth Glen Shee (Mr. 

 W. West). 



2/2. S. pyramidatum, West. 



Var. coilon, West. Very rare. Aberdeen Corrie of Loch 

 Kandor (Mr. W. West). 



ARTHRODESMUS (Ehr.\ Archer. 



(2). A. conergens, Ehr. 



Forma membrana irregulariter pnnctata, West. Very rare. 

 Aberdeen Corrie of Loch Kandor (Mr. W. West). 



COSMARIUM (Corda\ Ralfs. 



2/1. C. asperuin, West. Very rare. Kirkcudbright New Gallo- 

 way (Mr. W. West). 



2/2. C. furcatospermitm, West. Very rare. Orkney (Mr. W. West). 



(72.) C. ffolmiense, Lundell. 



Var. undatum, West. Very rare. Perth Glen Shee (Mr. 

 W. West). 



