ON SCOTTISH DESMIDIE.E 247 



38. C. obtiisitin, Breb. --Somewhat rare. Ross -- Achnasheen ; 



Inverness Glen Urquhart ; Aberdeen Longside, Whitely 

 Marsh near Alford, Heughhead, Aboyne, and near Ballater ; 

 Kincardine Clunie, by the Dee at Durris Bridge, Den of 

 Garrol, Scolty Dam, Cammie, Dalbrake, Kerloch, Glen 

 Dye, Slack of Birnie ; Perth Buchanty ; Argyle Mull. 



39. C. parvulum, Nag. Not common. Ross --Loch Kinnellan 



and Falls of Rogie ; Inverness Glen Urquhart, Cairngorm ; 

 Aberdeen - - Whitely Marsh, Howford and Bourtie near 

 Inverurie, Kintore, Springhill and Summerhill near Aberdeen 

 with zygospores, Slewdrum, Mosstown, Tomachar, and 

 Koynach Moor in Cromar, in marsh S.W. of Loch Kinnord 

 with zygospores ; Kincardine Raemoir, Glen Dye, Cloch- 

 naben, Loch of Lumgair ; Perth Durdie, and Arnbathie ; 

 Stirling Alloa Glen ; Fife. 



40. C. prcelongitin, Breb. Very rare. Aberdeen Moss of Logic 



in Cromar ; Kincardine Scolty Dam near Banchory. 



41. C. Pritchardianum, Archer. Not common. Ross Achna- 



sheen ; Aberdeen Auchterless, Alford, Kintore, Scotston, 

 Springhill, Brimmond, Aboyne, Tomachar, and Bilbo in 

 Cromar ; Kincardine Loch of Park, Upper Balfour, Paldy 

 Hill, near Cowie, Stonehaven ; Forfar Balquhadly Hill in 

 Fern, Menmuir ; Perth Durdie, Buchanty ; Stirling - 

 Fintray Hills. 



42. C. pronum, Breb. Very rare. Caithness Loch Hempriggs ; 



Ross near Tain ; Aberdeen south end of Scotston Moor. 



43. C. psendoclosterhtm, n. sp., Roy. Almost straight, very slender, 



forty to sixty times as long as broad ; breadth uniform ; 

 ends slightly rounded, with a small colourless space, but no 

 vacuole proper or moving granules ; frond smooth and 

 colourless, no suture ; chlorophyl in one pale green band 

 reaching close to the ends, and having at the middle of the 

 frond a semielliptical colourless space, as if scooped out of 

 one side, similiar to what is seen in C. obtusum, Breb. ; starch 

 granules 4-6 in one row. Length, 128-192 ^ ; breadth, 3 yu,. 

 This curious little species forms one of a small group of 

 which C. obtusum, Breb., may be taken as the type. They 

 do not accord well with Closterium, and undoubtedly should 

 be placed in a new genus. This it was my intention to do, 

 but there are other two species, also new, which I was anxious 

 to include, and at the time of writing specimens are not 

 available (the slide containing them having gone wrong !), 

 therefore I have made no change in the meantime. J. R. 



[/ am not acquainted with the species here described, and having no 

 authenticated specimen, am unable to give a figure. J. P. B.] 



