rnsMAlMl'M. 01 



Length 87-92 //. ; breadth 48-50 p.; breadth of isth- 

 mus 22 p.. 



SCOTLAND. Powlair in Birse, Aberdeen ; Scolty 

 near Baiichory, Kincardine (Roy fyBissett). 



Geor/r. Distribution.- -Germany. 



Var. hibernicum West. (PL LXX, figs. 12, 13.) 



C. plicatum Beinsch var. liibernicum West, Alg*. W. Ireland, 1892, p. 142, 

 t. 24, f . 9 ; Schroder, Beitr. Algen Eiesengebirges, 1898, p. 35. 



C. plico.tum var. Scoticum Rov & Biss. Scott. Desm. 1894, p. 171, t. 2, f. 2. 

 [Vide West & G-. S. West, Bee. publ. Desm. 1895, p. 67.] 



C. Holmiense Lund. var. hibernicum (West) Schniidle, Alg*. Bern. Alp. 

 1894, p. 95. 



Larger than the tvpe, sides of semicells sliolitlv 



O / _L Of 



hollowed below the apex, apical angles a little promi- 

 nent, and apex strongly convex in the middle. 



Length 88-96 /* ; breadth 47-52 p, ; breadth of isth- 

 mus 17-21 p.. 



SCOTLAND. The Vat, Press whin (Cromar), Aberdeen 

 (Roy Bissett). Lewis, Outer Hebrides ! 



IEELAXD. Achill Island, Mayo ! Carrantuohill, Kerry ! 



Geofjr. Distribution . Germany. Switzerland. 



This characteristic variety is apparently very scarce in the 

 mountainous districts of Scotland and Ireland. Eov and 



t/ 



Bissett say it is a rupestral species, but we have found it 

 mostly in the boo-o-y springs on the mountains of the west 



/ ~ O / 



coasts. Schmidle, in 1894, placed the variety under C. 

 Holmiense Lund., but although it undoubtedly connects C. 



O v 



plicatum with C. Holmiemte var. integrum Lund.,, yet it is 

 much nearer C. plicatum than C. Holmiense. This relation- 

 ship is made sure on examining a number of specimens of 

 C. plicatum. 



83. Cosmarium Debaryi Arch. 

 (PL LXX, figs. 14-16; PL XCIII, fig. 2.) 



Pleurotsenium cosmarioides De Bary, Coiij. 1858, p. To, t. 5, f. 32, : 

 Bulnh. in Hewigia, 1859, p. 21, t. 2, f . 8 ; Eabenh. Flor. Europ. Alg. Ill, 

 1868, p. 144 ; p. 104 (cum fig-, xylogr.). 



Cosmarium Debaryi Arch, in Pritch. Infvis. 1861, p. 735; Lund. Desm. 

 Suec. 1871, p. 52 ; Kirchn. Alg. Schles. 1878, p. 146 ; West, Alg. W. 

 Ireland, 1892, p, 164 ; Alg. Engi. Lake Distr. 1892, p. 730 ; Eoy c*c Bis.- 

 Scott. Desni. 1894, p. 45 ; Nordst. Index Desm. 1896, p. 97 ; West \ 

 G. S. West, Alga-fl. Yorks. 1900, p. 90 ; Alg. X. Ireland, 1902, p. 42. 



