Acta Societatis pro Fauna et Flora Fennica, 49, N:o 7. 13 



Hab. Gov. of Archangel. PI. 3 fig. 8—9. 



var. angusticeps, nova var. Lobo polari angustiore vix 

 dilatato medio incisura introrsum acuta extrorsum aperta 

 (angulis rotundatis) dissecto. Cellulae a vertice visae tumore 

 centrali valde prominenti. Long. 25, lat. 20, crass. 12, h, 

 isthm. 5,3 it. [N:o 1013]. 



This variety is well characterized by its narrow polar 

 lobe with a deeper and narrower median notch. 



Hab. Hirvensalo (SW). leg. Elfv. — PI. 3 fig. 10—11. 



Eu. gayanum De Toni (syn. = E. formosum Gay, Mo- 

 nogr. loc. pi. 1 f. 9). Forma angulis basalibus non acutis. 

 Membrana intra angulos granulis minimis ornata et in centro 

 semicellularum tumore seu verruca armata. Long. 10,6—11,3, 

 lat. 10,6—11,9, crass. 6,6—6, isthm. 3,9—4,6//. [N:o 1010b, 

 1010bb]. 



Perhaps E. binale f. Strom, Frw. alg. Telemark pi. 3 

 f. 6 is nothing but E. gayanum, the granulations being very 

 delicate and difficult to distinguish. Compare also E. binale 

 f. Schmidle, Pite Lappm. pi. 2 f. 24 (inf.); E. sibiricum 

 Boldt. 



Hab. .Isthmus karelicus" (SE). PI. 3 fig. 12—15. 



Eu. sibiricum Boldt, Sibir. chlor. pi. 5 f. 2; John- 

 son, New rare Desm. II page 292 pi. 239 f. 13. Forma fen- 

 nica nova f. Angulis basalibus rotundatis glabris; angulis 

 lateralibus et apicalibus spinulis parvis armatis; verruca 

 centrali valde reducta, glabra; Long. 19,8, lat. 15,8, crass. 9,2, 

 isthm. 4,6 ,u. [N:o 1010 a]. 



Hab. Raikala near the Imatra Falls (SE), leg. Hj. 

 Hjelt. PL 3 fig. 17—18. 



forma exsecta nova f. Apicibus profunde exsectis, 

 angulis basalibus minus rotundatis. — In this systematical form 

 I have united two very slightly different forms, viz. a larger 

 (long. 19,8., lat. 15,8, isthm. 6 fi) [N:o 1011] much resembling 

 the f. fennica nob. and a smaller (long. 14,2, lat. 11,9, isthm. 

 3,i //) [N:o 883] with the margins of the apex and of the 

 lateral lobes acutely granulate (resembling E. denticulatum 

 in West, Mngr. II pi. 39 f. 3). 



