COSMAEIUM. 253 



and Penyghent, W. Yorks ! Mickle Fell and Scar- 

 borough Mere, N. Yorks! Leicestershire (Ron). 



WALES. Capel Curig, Carnarvonshire ! 



SCOTLAND. Near Mintlaw, Aberdeen ; Clova Table- 

 land and Canlochan, Forfar (Roy fy Bissett). Craig- 

 an-Lochan and Spittal of Grlen Sliee, Perth ! Loch 

 Xess, Inverness ! Plankton of Loch Nan Cuiiine, 

 Sutherland (.7. Hurra//) I Orkneys ! Shetlands ! 



IRELAND.- -Near Grlenties and Lough Anna, Donegal! 

 Creo'o'an Louo-h. Galwav ! 



O O O t/ 



Geogr. Distribution. Gralicia in Austria. Norway. 

 Sweden. N. Russia. Faeroes. Nova Zembla. Spitz- 

 bergen. Greenland. Ceylon. Madagascar (var.). 

 E. Africa. Newfoundland, United States. Brazil. 

 Patagonia (var.). 



C. subspeciosum is at once distinguished from C. speciosum 

 by the different proportions and more pyramidate form of its 

 semicells. as well as bv its small and rounded central tumour. 



V 



The two species often occur intermingled in subalpme boggy 

 springs. 



It appears to us, however, to be much more closely allied to 

 C. pulcherrimum, from which it is only distinguished by the 

 shape of the semicells, which are much less inflated and 

 truncate at the apex. C. binum is also very nearly related, 

 differing in its more conspicuously emarginate crenations, its 

 broader apex, and in the structure of its central tumour. 



Var. validius Nordst. (PL LXXXIX, figs. 12, 13.) 



C. speciosum var. inflatum Mask. Kew Zeal. Desm. Add. 1883, p. 240, t. 24, 



f. 6 ^according to Maskell, 1892]. 

 C. subspeciosum Nordst. var. validius Xordst. in Botan. Notis. 1887, 



p. 160 ; Freshw. Alg. N". Zeal. 1888, p. 49, t. 5, f . 10 ; Borge, Siissw. 



Chlor. Archang. 1894, p. 31 ; Johnson, Bare Desm. U. S. II, 1895, 



p. 294, t. 240, f. 33 ; Borge, Trop. u. stibtrop. Siissw.-Chlor. 1899, p. 23 ; 



Siisswasseralgen Stid-Patagon. 1901, p. 26. 

 C. subspeciosum Xordst. var. effigiatum West &: G. S. "West, Alg. Madag. 



1895, p. 69, t. 7, f. 16. 



Cells rather larger, semicells with 7-9 lateral crena- 

 tions, and a larger basal tumour furnished with 7-9 

 vertical series of granules. 



Length 68-84 ^ ; breadth 47-53 JJL ; breadth of isth- 

 mus 17*5-22 /x; thickness 33-34 At. 



