A NEW SPECIES OF DISCINELLA 215 



the herbarium at Stockhohn, among specimens from Siberia, 

 where it had not previously been recorded. He also again recog- 

 nized it, among plants wrongly determined, from the glacial 

 deposits of Denmark and perhaps Galicia. ■' 



Armaria arctica is therefore circumpolar, and it had formerly 

 a wide extension southward. 



Dr. Weber's figures and description made me re-examine some 

 unknown fruits which I had obtained at various times from British 

 glacial deposits, but could not determine ; they certainly did not 

 belong to A. maritivia, and the American A. arctica was not in 

 my collection. Comparison leaves no doubt that this circumpolar 

 species was common also over the lowlands of Britain during the 

 Glacial Epoch. I have fruits of it from the base of the boulder 

 clay at Mundesley, on the Norfolk coast (associated with Salix 

 polaris and Betula nana) ; from the top of the glacial deposits at 

 Saughton and Corstorphine, close to Edinburgh (associated with 

 S. polaris, S. herbacea, S. reticulata) ; and from material collected 

 by Messrs. E. T. Newton and S. H. Warren at Bonder's End, in 

 the Lea Valley, where also it is associated with Salix herbacea and 

 Betula nana. 



As this Arctic species was formerly so widely distributed over 

 the lowlands of Europe, the living mountain forms of Armcria in 

 Britain should now be re-examined critically, for it is probable 

 that they will be found to belong to this species, or to one of the 

 allied Arctic species, and not to the sea-coast A. maritima. As 

 distinguished from A. maritima the fruiting calyx of A. arctica is 

 more robust, shorter, broader, much more openly campanulate, 

 and is densely pilose on the ribs but smooth on the intervals. All 

 these characters are well seen in the fossils, though some of the 

 specimens, as we should expect, have lost the hairs. The smooth 

 intervals at once separate A. arctica as belonging to a different 

 section of the genus from that in which A. maritima is placed. t 

 The fruiting calyx gives the best specific characters in this genus. 



A NEW SPECIES OF DISCINELLA. 



By J. Ramsbottom. 



The genus Discinella was founded by Boudier in his " Nouvelle 

 classification naturelle des Discomycetes charnus," in Bull. Soc. 

 Myc. Fr. 1885, i. p. 112. There is no Latin description, but the 

 generic characters can be easily understood from the information 

 supplied in the key to the genera, and from the fact that Phialea 

 Boudieri Quel, is made the type species. The characters are 



* Die Mammutflora von Borna, Abh. Nat. Ver. Bremen, 1914, Bd. xxiii. 

 Heft 1. 



t See Boissier in De Candolle, Prodromus Systematic Naturalii' Herini Vege- 

 tabilis, pars xii., 1848. 



