XKTiUUM. 67 



Cells of medium size, o t times longer than their 

 diameter, not constricted, oblong-cylindrical, gradually 

 narrowed towards the rounded apices; chloroplasts 

 axile, with six longitudinal plates which are deeply 

 notched alono- their free mar o-ins. 



O O 



Zygospore spherical (according to Wolle). 



Length 90-1 35 /i; breadth 32-33^. 



ENGLAND. Common in the upland districts of West- 

 moreland and Yorks ! Surrey ! Devon ! Cornwall ! 



\VALKS. General in Carnarvonshire! 



SI'OTLAXD. Sutherland! Ross, Aberdeen, Kincar- 

 dine, Forfar!, Perth!, Argyll, Arran (llmj $ .Hi'.wft). 

 Inverness ! Lanark ! Dumfries ! Lewis and Harris, 

 Outer Hebrides ! 



IKELAXD. Frequent in Donegal! Lough Fea, Lon- 

 donderry! Wicklow and Dublin (Archer). 



(jrco</i'. Distribution. Germany. Austria. Hungary. 

 Norway. Sweden. Lapland in Russia. Faeroes. India. 

 West and East Africa. Somalilaiid. Ecuador. Brazil. 

 United States. 



This plant occurs abundantly in the upland hogs of most 

 parts of the British Islands, particularly amongst Sphagnum 

 in peaty pools. Apart from its smaller size, its form alone is 

 sufficient to distinguish it from most forms of JV. Digitus. 



Var. cylindricum West & G. S. West. (PI. V, tig. 7.) 



N. ulilnm/tnn var. cylindricuni West & G. S. West, Notes Alg. Ill, ISJo:!, 

 p. S (sep.), t. 446, f. 10. 



Cells smaller than in the typical form and exactly 



./ 1 j 



cylindrical ; apices hemispherical ; chloroplasts as in 

 the typical form. 



Length 5 7-73 ^i; breadth 17-lS'o /n. 



ENGLAND. Helvellyn, Westmoreland ! 



WALES. Capel Curig, Moel Siabod, Llyn Idwal, 

 Llyn Cwlyd and Llyn Gwynant, Carnarvonshire ! 



SCOTLAND. Near Tarbert, Harris, Outer Hebrides ! 



Geoijr. Distribution. Italy. Somalilaiid. 



This variety is often abundant in the boggy portions of 

 upland moors, round the margin of lakes, etc., frequently 



