ON SCOTTISH DESMIDIE^ 173 



marshes between Loch Kinord and Cambus-o'-May; Kin- 

 cardine — Muiryhaugh and Dalbrake in Strachan ; Argyle — 

 in Glen Coe ; Arran — in North Glen Sannox. 



4. M. cre?iata, Breb. — Pretty common. Ross, Inverness, Aberdeen, 



Kincardine, Forfar, Perth, Argyle, Arran, Fife. 



5. M. Crux-Melitensis (Ehr.), Ralfs. — Rare. Aberdeen — Scotston 



Moor, Brimmond, Den of Gowner near Old Meldrum, 

 Slewdrum, beside Birsemore Loch, Tomachar and Home- 

 head in Cromar ; Kincardine — somewhere near Cammie in 

 Strachan : Forfar — Clova Tableland ; Perth — Durdie, near 

 Perth. 



6. M. denticulately Breb. — General. 



ft notata, Nordst. — Not uncommon. 



y a?!gusto-si?iuata, Gay. — Rare, or overlooked. Kirkcud- 

 bright (Mr. W. West). 



7. M. fimbriate Ralfs. — Rare. Aberdeen — Scotston Moor, near 



Kintore, Presswhin, Loch Ullachie, near Ballater ; Kincar- 

 dine — near Bridge of Feugh ; Forfar — Tannadice Curling 

 Pond, marsh north-west from Menmuir Church. 



ft spinosa, Bisset, n. var. — Very rare. 



Differs from the typical form in having a row of minute 

 spines along each side of the principal sinuses, three or four 

 close to the base of each semi-cell, and a row of about four 

 under the base of the end lobe. Length, 210 /x ; breadth, 

 200/x; isthmus, 25 p (Plate IV. fig. 3). Aberdeen — Slew- 

 drum, Loch Ullachie and marsh west of it. 



8. Af.Jenneri, Ralfs. — Not uncommon. Sutherland, Ross, Inver- 



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



9. M. mucronata ( Dixon), Rab. — Not common. Ross, Inverness, 



Aberdeen, Kincardine, Forfar, Perth, Argyle, Arran. 



10. M. oscitatis, Ralfs. 



This species was reported from Aberdeen by the late Mr. 

 Peter Grant ; but we have seen nothing in this country 

 agreeing exactly with Ralls's drawings of it. From two 

 localities — viz. the head of Glen Tannar, Aberdeen, and 

 Balquhadly Hill, ill Fern, Forfar, examples were seen which 

 came near it, but they differed, essentially as 1 think, in the 

 toothing of the loin . 



11. A/. papUUferOy Breb.— General. Has been found with y\ . 



Spores in Aberdeen near I )innet ; and in Perth near I'owlis 

 Wester. 



12. M. finnatifida (Kg.), Kalis. — General, but scarce. I orms simi- 



lar to those noted by \\'alli< h and ElfVing have been observed, 

 particularly in a pool a little to the north of Loch 1 >a\van. 



