ON SCOTTISH DESMIDIE/E 101 



53. C. elegantissiinu/ii, Lundell. Very rare. Aberdeen Powlair 



and Slewdrum ; Kincardine near Bridge of Bogandreep 

 and Blackball in Strachan ; Perth Glen Garry, Ben Lawers. 



54. C. Etchachanense^Vi.^. Medium sized ; semi-orbicular; about 



one-third longer than broad ; semi-cells semi-orbicular ; basal 

 angles bluntly acute ; sides unequally undulated ; ends rather 

 flattened and more obscurely undulated ; surface finely granu- 

 lated ; granules in perpendicular rows, about nine in a row ; 

 constriction deep and narrow. Length, 38-40 //,; breadth, 

 30-32 [j.; isthmus, 12-13 1 L - (Our Plate I. fig. 15.) 



Very rare. Aberdeen Corrie Etchachan (Ben Macdhui). 



55. C. excavatum, Nordst. Rare. Aberdeen, Kincardine, Forfar. 



56. C. exiguum, Archer. General, but scarce. 



57. C. flavum, n. sp. Small sized; length and breadth equal; 



semi-cells reniform, in side view circular ; constriction deep 

 and opening widely ; frond smooth ; zygospore orbicular, 

 smooth. Length, 32 //, ; breadth, 32 //, ; isthmus, i o ^ ; 

 diameter of zygospore, 40 /z. (Our Plate II. fig. 17.) 



This species is closely allied to C. Jacobsenii, Roy, C. 

 ellipsoidcum, Elfv., and C. contraction, Kirch., but appears 

 to be sufficiently distinct. 



Rare. Sutherland Loch Inver; Aberdeen Scotston, 

 Birsemore, Craigendinnie, Dinnet, Dawin, Auchnerran, Glen 

 Clunie ; Kincardine Crathes, Cammie, Dalbrake. 



58. C. fontigenum, Nordst. Not common. Ross; Inverness 



Skye, and near Brin ; Aberdeen ; Kincardine ; Perth. 



59. C. formosulum, Hoff. Rare. Argyle Ben Laoigh ; Wigtown. 



60. C. galeritum, Nordst. Rare. Sutherland near Loch Inver ; 



Inverness near Loch Coruisk (Skye) ; Aberdeen Ben-na- 

 Chie, Morven, Birse, Aboyne ; Perth ; Arran near Corrie. 



6 1. C. Garrolense, n. sp. (C. latereundatus, R. and B.'s MSS.) 



Medium sized ; about one-sixth longer than broad ; sub- 

 quadrangular ; sides, with 3 to 4 undulations, converging 

 slightly towards the ends, which are slightly curved, and 

 obscurely plicated ; constriction linear and moderately deep ; 

 membrane sparingly and obscurely punctate. Length, 30 /* ; 

 breadth, 25 //,; isthmus, 9-11 /JL. (Our Plate II. fig. 4.) 



Very rare. Kincardine Den of Garrol ; Forfar Clova 

 Tableland. 



62. C. gemmiferum, Breb. Rare. Ross Loch Kinnellan and 



Falls of Connon (Mrs. Farquharson) ; Inverness^Loch 

 Ruthven, etc. (Mrs. Farquharson) ; Aberdeen near Alford 

 and Cambus-o'-May ; Fife. 



