r. 87 



WALKS. Llvn Idwal ! Llvn-v-cwni-ffynon ! , Snow- 



r V * ,' 



don (Turner), Carnarvonshire ! 



SCOTLAND.- -Rhiconich, Sutherland! Loclmagar, 

 Aberdeen (at 3.-500 ft.) ! 



IKELANII. Near Grlenties, Donegal! Slievecomme- 

 dagh, Down ! 



Geogr. Distribution. Germany. Austrian Tyrol. 



14. Penium granulatum (Benn.) iwl. 

 (PI. VIII, fig. 39.) 



Docidiv.m granu.latum Benn. Alg. N. Cormvall, 1887, p. 15, t. 4, f. 17; 

 Cooke, Brit. Desm. 1887, p. 184, t. 65, f. 2 ; Nordst. Index Desm. 1896, 

 p. 134. 



Cells small, about 5 times larger than their diameter, 

 slightly constricted in the middle, semicells oblong- 

 ellipsoid with the apices broadly rounded; cell- wall 

 " conspicuously covered with pearly granules." 



Length 50 /u ; breadth 10 /. 



ENGLAND. Mawgan, Cornwall (A. IV. Bennett). 



15. Penium Clevei Lund. 

 (PI. VIII, figs. 36, 37.) 



Penium Clevei Lund. Desm. Suec. 1871, p. 86, t. 5, f. 11 ; West, Alg. W. 

 Ireland, 1892, p. 129 ; Alg. Eng. Lake Distr. 1892, p. 721 ; Nordst, 

 Index Desni. 1896, p. 74 ; West & G. S. West, Some Desm. U. S. 1898, 

 p. 281. 



Peniu'it Thu-aitesii Cleve (non Ealfs). 



Calocylindrus Clevei Wolle, Desm. U. S. 1884, p. 56, t. 50, f. 27. 



Dijsphinctium Clevei De Toiii, Syll. Alg. 1889, p. 893. 



Cells of medium size, 2-|-3 times longer than their 

 diameter, subcylindrical, slightly constricted in the 

 middle ; semicells pyramidate-ovate, with rounded 

 apices ; chloroplasts with one pyrenoid (rarely with 

 two) ; cell-wall finely punctate and at each pole finely 

 granulate. 



Zygospore unknown. 



Length 9<>-10S /< ; breadth 36-42 /t ; breadth of 

 isthmus 33-38 //. 



