Conjugatae, Desmidiacese, Pleurotseniopsis. 915 



Loefgren). — Lat. 58-65 u-., long. 68-72 u., crass. 38-40 a., lat. 

 isthm. 20-24 a,, lat. apic. circ. 26 a. Habitu Cosm. Brebissonii f. 

 Delpont. (Spec. Desm. subalp. t. IX, f. 17-22) simile differt granulis 

 Gt dispositione massae chlorophj-liaceai. — Var. tumefactum Nordst. 

 Freshw. Alg. of. N. Zeal. and Austral. p. 62, t. 7, f. 2, Bolaniska 

 Notiser 1887, p. 163 et Notarisia 1888, p. 403: semiccllulis late- 

 ribus paullo magis convexis, angulis inferioribus paullo magis 

 rotuiidatis;, granulis fortasse paulio raajoribus et minus crebris, ia 

 cen'ro membrana pauUo incras^^ata punctata (et scrobiculata?), e 

 vertice visis late eliipticis, in centro granulis nullis: o latere fere 

 circularibus,seriebus granulorum convergentibus; massa chlorophyl- 

 lacea....? (pyrenoidibus binis?). Ad «Omatangi» in Nova Zelandia 

 (I^erggren). — CellulfB 72-77 c; 54-62, lat. isthm. 24-30 jj.., crass. 

 35-40 ^. 



20. Pleurotaeniopsis magnifica Nordst. Freshw. Alg. of N. Zeal. and 2202 

 Austral. p. 62 (sub Cosmario), t. 6, f. 19, Cosmarium gemmi- 

 ferum Mask. N. Z. D. Add. p. 240, t. 24, f. 4, nec alior. — Ma- 

 gna, 108-120 s 88-95, medio profunde constricta, iocisura angusta 

 lineari; semicellulis circiter 2 partes circuli efficientibus, apice trun- 

 catis vel leviter retusis. angulis inferioribus rotundatis vel obtuso- 

 rotundatis, lateribus couvexis, marginem versus et in margine ver- 

 rucosis, verrucis cavis truncato-eraarginatis in series concentricas 

 (alternantes) ordinafcis, in centro (quoque in turaore basali) in area 

 magna circulari-elliptica granulatis et scrobiculatis, granulis intus 

 cavis in series circ. 7 horizontales quincuQcialiter ordinatis, inter 



2 granula binis scrobiculis (circa singula granula 6 scrobiculis); e 

 basi visis medio utrinque tumore praeditis, apicibus rotundatis raar- 

 gine et intra raarginera verrucis (ut descript.) obsessis, apertura 

 isthrai circulari-quadrata; e latere visis late ovatis, turaore lato 

 basali, apice rotundato-truucatis, verrucis plus miaus quincuncia- 

 liter ordinatis obsessis; massa chlorophyllacea semicellularura la- 

 teralibus e chlorophoris laminaribus quaternis constituta. 



Hab. in lacu «Ljndon» Novre Zelandi?e (S. Berggren). — Cos- 

 mario quaiernario Nordst. in Wittr. et Nordst. Alg. exs. sub n. 383 

 fortasse proximum, differt (ceteris exceptis) tuberculis truncato 

 emarginatis, nullis granulis integris ; crass. 56-64 y.. lat., isthm. 

 34-36 u.. 



21. Pleurotaeniopsis? pseutlopachyderma (Nordst.) De-Toni, Cosma^ 2203 

 rium pseudopachijdermum Nordst. Freshw. Alg. of N. Zeal. aud 

 Austral. p. 53, t. 5, f. 20, Botaniska Notiser 1887, p. 161, Nota- 



