ON SCOTTISH DESMIDIE/E 103 



rows of 3 to 4 slightly larger granules in each, placed close 

 together ; two rows of granules close to the end ; end view 

 oval, no central protuberance ; side view of semi-cell globular ; 

 isthmus about one-third the diameter. Length, 25-27-5/7,; 

 breadth, 23-24-5 /x ; isthmus, 7-8 //. (Our Plate I. fig. u.) 



Named in honour of the Rev. Dr. Gregor of Pitsligo, 

 from whom the first example was received. 



Very rare. Banff Iron Hill (Aberdour) ; Aberdeen 

 Collieston and Castleton, Braemar ; Perth Loch Lundie ; 

 Wigtown. 



69. C. Hammeri, Reinsch. 



Forma A. majus. This certainly comes very near C. 

 homalodennuni, Nordst., but differs from the latter in 

 " margo terminalis rectus." If the two are really 

 distinct, Reinsch's form does not seem to occur with 

 us. For distribution, see C. homalodermwn . 



Forma C. octogibbosum, Reinsch. Rare. Aberdeen 

 Scotston Moor, near Aboyne, in Birse, near Ballater, 

 and in Glen Clunie. Kincardine Cammie, Strachan. 



70. C. hexalobum, Nordst. Rare. Ross in the Black Isle; 



Aberdeen - - Koynach Moor and Presswhin, Cromar ; 

 Craigendinnie, Aboyne ; and head of the Forest of Birse ; 

 Kincardine Den of Garrol, Durris ; Perth Glen Shee. 

 /3 minor, n. var. Smaller than the type ; ends less pro- 

 duced, and the undulations not nearly so bold. 

 Length, 32-35 ^; breadth, 28-30 /z; isthmus, 10-11 

 //,. (Our Plate I. fig. 12.) 



Very rare. Aberdeen Presswhin, Cromar, along with 

 the type. 



71. C. hexastichum, Lundell. Very rare. Aberdeen Dalbagie 



near Ballater. 



f3 octastichum, Nordst. Very rare. Inverness Loch 

 Ruthven (Mrs. Farquharson). 



72. C. Holmiense, Lundell. Not common. Ross at Strome ; 



Inverness Glen Urquhart, and in Skye at the Quirang and 

 near Loch Coruisk ; Aberdeen several localities in Cromar, 

 and Upper Deeside ; Kincardine Clochnaben ; Forfar 

 Canlochan and Reeky Linn ; Perth Ben Lawers, and at 

 Bracklin near Callander ; Stirling Fintray Hills and Alva 

 Glen ; Arran at Corrie. 



(3 integrntu, Nordst. Not common. Inverness Glen 



Urquhart ; Aberdeen Cromar and Upper Deeside ; 



Forfar Lundie and Reeky Linn ; Perth Glen 



Shee and Craig-an-Lochan. 



