Conjugata?, Desmidiaceae, Cosmariura. 1013 



1876 p. 20, Cosmarium crenatum var. costalum Nordst. Desm. 

 spetsb. p. 30, t. 6, f. 9. — Submediocre, diametro circiter tertia parte 

 longius, profunde constrictura, sinu lineari angustissimo; semicellulis 

 trapezicis, paullo infra raedium mox sursum attenuatis, dorso lato 

 subquadricrenato (crenis lenissime emarginatis) truncatis, lateribus 

 inciso-crenatis, crenis 4-5 apice ienissirae emarginatis (inferioribus 

 1-3 Si\3pe integris, paullo rainoribus), granulis basalibus in jugis 

 vel costis (unde nomen specificum) verticalibus 5-7 positis , tu- 

 morem basalem efficientibus , ad marginera versus subtiliter gra- 

 nulatis, granulis in series concentricas et radiales regulariter or- 

 dinatis, binis (exceptis granulis intimis et ad basim versus); a ver- 

 tice visis ellipticis raedio, ventricosis, a latere rectaugularibus, an- 

 gulis superioribus rotundatis, utrinque turaore basali raagno prsc- 

 ditis, pyrenoidibus singulis. 



Hab. in insulis spetsbergensibus et Nova Seralia. — Dimens. 

 38-43^30-35; crassit. 20-25 a. latit. isthmi 14-15 ,a. statil. apic. 

 16-18 a. — Var. subhexalobum Boldt Studier p. 20, t. I, f. 23: 

 sinu lineari, angusto, extrerao arapliato; seraicellulis subtrapezicis , 

 sursum attenuatis , sub apice pauUum dilatato constrictis; a latere 

 visis rectangularibus; angulis superioribus rotundatis , utrinque 

 tumore basali magno. Ad «S. Julianehaab » in Groenlandia. Diraens, 

 37,2*31,2 lat. isthmi 12 jj.., crassit. 19,2 p.., lat. dors. 19,2 fji., 

 longit. marg. terra. 16,8 f/. 



184. Cosmarium Blyttii Wille Norg. Ferskv. Alg. p. 25, t. 1, f. 7, 2121 

 Wolle Desm. U. S. p. 87, t. 19, f. 31-33. Boldt Sibir. Chloroph. 



p. 106. — Parvura, paullulum longius quam latius; seraicellulis sub- 

 reniforraibus, apice truncatis 4-crenulatis , lateribus eroso-crenatis 

 (crenis 3), intra raarginem graoulatis, granulis secus 2 series di- 

 spositis, serie exteriori granulis 14, interiori granulis 9; protu- 

 berantia centrali parva; e latere visis in utroque latere papilla 

 donatis ; e vertice conspectis protuberantia seu papilla in utro- 

 que latere instructis. 



Hab. in aquis a Roednaes n Norvegias (Wille); ad County, New Jer- 

 sey, in lacu «Wood» etc. Americae borealis (Wolle), ad «Tunguska» 

 Sibirife (R. Boldt). — Dimens. 17-18 = 14-15. CelluL-e, ex Boldt 1. 

 c. 12-15,5^10,8-14,5; Latit. isthrai 3,6-4,8 p. 



185. Cosmarlum supraspeciosum Wolle Desm. U. S. p. 88, t. 50, f. 2422 

 5-6. — Magnura, late ovatum, 90-95-65-70, apicibus truncatis, 

 profunde constrictura, isthmo circiter 20-24 p.. lato, sinu angusto 

 lineari, marginibus crenulatis (crenis 30 et ultra in utraque se- 



