231 



185. S. muricatum Bréb. 



Found in galhcrings from (llivcrsrejn (Str.); Wille also inentions 

 having mel with this species (1. c. p. 29). 



186. S. asperum Bréh. 

 Long. — 50 jW. 



In a gathcring from Skopen (San do). 



187. S. scabrum Bréb. 



Almost like my figure^ in Nordst. et Wittr. Exsicc. Nr. 1114 

 and in Bot. Notiser 1893, p. 196, but differs from it in vertical view 

 in the more broadly rounded angles of tbe semicell. 



Long. = 33 ;M ; lat. = 30 /<. 



Gliversrejn near Tliorsliavn (Str.). 



188. S. echinatum Brcb. 

 Lat. = 35 //; lat. ^ 32 n. 

 Thorsliavn (Str.). 



189. S. horametrum Roy & Biss. 



On Scottish Desm. p. 21, tab. 3, fig. 2. 



Var. fæpoensis n. v. Plate VII, fig. 14. 



A formå typica var. færoensis præcipue differt semicellulis a 

 fronte visis late ellipticis incisura mediana fere acutangula, a vertice 

 visæ semicellulæ lateribus late convexis, spinis minus numerosis 

 instructæ. 



Long. =^ 51 (M; lat. =^ 40 //; lat. isthm. = 18 \t. 



It is, however, not without hesitation that I refer this form to 

 this species, as it differs rather considerably from it; but as I have 

 only seen a very few specimens I prefer for the present to regard 

 it as a form belonging to this species. 



In a gathering, locality not given. 



190. S. Meriani Reinsch. 



Algenfl. Franken p. 160, tab. 12, fig. 1. 



Long. = 46 |U; lat. = 19 /<. 



In a gathering from mountain heights (450 m.) on Bord 6. 



^ To this figure I have 1. c. attached the following remark: > Figura Ralfsii non 

 bona, utile mihi videtur figuram novam darc . Now Mr. Schmidle (in »Pite Lapp- 

 mark und Vesterbotten Siisswasseralgen- p. 54) thinks tliat he has not only found 

 a form whicli corresponds to mj' form but also one which corresponds to that of 

 Ralfs's, and he sajs: Formå cum figura in Ralfs 1. c, quæ ex clarissimi Boergesenii 

 opinione non est bona plane congruens . To this statement I beg to remark that I 

 must pcrsist in maintaining that Ralfss figure is far from good (especially fig. 20a) 

 and that it is impossible to make a reliable determination on the faltii of it. 



