24 NORDSTEDTj DESMIDIE/E ARCTO^E. 



25. C. Phaseolus Bréb. ß. elevatum Nordst. (Sydl. Norg. Desm. 

 pag. 17, fig. 5). 



Long. = Lat. = 27 (.t, crass. 19 /*, lat. isthmi 11 f.t. 



Ad Mosselbay. 



Unum tantum individiuum a me visum. 



26. C. Schliephackeanum Grün, (in Rab. Fl. Eur. Alg. sect. 

 III, pag. 167). Tab. VII, fig. 15. 



Forma spetsbergen sis. Semicellulse e vertice visa? 

 subrhomboideo-ellipticse, medio utrinque Verruca depressa 

 (ssepe vix visibili) ornatse; a latere conspectse obovato-circu- 

 lares apice truncato-rotundatee ; membrana achroa. Zygo- 

 sporae glabrae, rectangulares, lateribus paullum tumidis, apici- 

 bus subretusis (1. interdum elliptica? apicibus rotundatis, 1. 

 plus minusve irreguläres, fere ut in Cosmario tincto), a 

 latere visa? ovales, a verticse^conspecta? circulares, membrana 

 plumbea, semicellulis residuis. 



Long. 10 — 13 «, lat. 12 — 13 /ii, crass. 9 — 10 /n, lat. 

 isthmi 7 — 8 (.l. Long, zygosp. 21 — 22 /i, lat. 14 — 18 (x. 



Ad Adventbay (c. zygospor.), Cap Thordsen (Sauriehook). 



27. C. subreniforme nov. sp. Tab. VII, fig. 16. 



C. submediocre, fere tam longum quam latum, profunde 

 constrictum, sinu lineari angustissimo extremo ampliato; 

 semicellulse reniformes apice non producto truncato indistincte 

 crenulato-denticulata3, margine laterali granulis parvis cir- 

 citer 7 — 8 prsedito, granulatse granulis subirregulariter di- 

 spositis, in centro nullis, sed tumöre basali minus elevato 

 granulato granulis in series 5 verticales (apicibus paullo 

 convergentes) instructse; a vertice visse anguste elliptica? 

 granulatse, granulis in series transversales dispositis, in centro 

 nullis, medio utrinque tumöre parvo granulato pra?ditse; a 

 latere visae ovato-circulares. Latitudo dorsi dimidio dia- 

 metri transversalis corporis paullo minor; latitudo isthmi 

 tertia pars, crassitudo corporis duae partes latitudinis cellulär. 

 Nuclei amylacei? 



