ON SCOTTISH DESMIDIE.E 243 



109. S. Sebaldi, Reinsch. 



P or?iatum, Nordst. — Rare. Ross — Falls of Rogie ; 

 Aberdeen — Brimmond, Slewdrum, old channel of 

 Dee below Aboyne, Powlair, near Dinnet, Tomachar ; 

 Kincardine — plentiful in a moraine pool above 

 Cammie ; Perth — Durdie Moor ; Kirkcudbright — 

 New Galloway. 



1 10. S. setigerum, Cleve (S. Royanum, Archer). — Extremely rare. 



Argyle — Glen Coe (Mr. Archer, by whom only this fine species 

 has been found). It is not known to occur elsewhere in the 

 British Islands; and there are very few Continental localities. 

 Glen Coe specimens are figured on our Plate III. fig. 9. The 

 specimen in front view has been lying a little obliquely, hence 

 the end margin is too straight : it should be very slightly convex. 



in. S. sexa?igulare, Bulnh. — Extremely rare. Inverness — near Brin 

 (Mrs. Farquharson). 



All the examples seen were 6-radiate, agreeing exactly with 

 Bulnheim's form. All the Welsh and Irish specimens which 

 have come under my observation were 5 -radiate. Mr. 

 Archer was the first to note this handsome form as a distinct 

 species ; it having turned up in one of his early visits, if not 

 his first, to Connemara. 



112. S. sexcostatum, Breb. — Rare. Sutherland — Loch Inver ; Aber- 



deen — Brimmond, Ben-na-Chie, south of Birsemore, near 

 Craigendinnie, Dalbagie, Lochnagar, Glen Callater Table- 

 land ; Kincardine — Nigg, near Durris Bridge, Gillan, Curran, 

 Muiryhaugh ; Forfar — Canlochan (a five -angled form); 

 Perth — Ben Lawers, Rannoch. 



Sub. sp. productum, West. — Not common. Sutherland, 

 Ross, Aberdeen, Kincardine, Forfar, Perth, Dum- 

 barton, Argyle, Renfrew. 



113. S. spongiosum, Breb. — Not common. Sutherland, Ross, Inver- 



ness, Aberdeen, Kincardine, Forfar, Perth, Argyle, Stirling. 



114. S. subscabrum. Nordst. — Very rare. Kincardine — in a mor- 



aine pool in Glen Dye. 



115. S. teliferum, Ralfs. — General. Occasionally with zygospores. 



116. S. tetraceruntf Kl;. — General. 



117. S. tumidum, Breb. — Not common. Sutherland, Ross, Inver- 



ness, Aberdeen, Kincardine, Forfar, Perlh. 



1 1 S. S. turgescens, De Not. — Not common. Ro^, Inverness, 

 Aberdeen, Kincardine, Forfar, Perth, Wigtown. 



119. S. lingerie Reinsch. — Very rare. Inverness — Loch Ruthven ; 

 Aberdeen — old channel of Dee below Aboyne ; Kincardine 



— Kcrloch. 



