Protococcoidcno, Palmellaceae, Tetraodron. 500 



p. 104, Pohjedrmm lelragonum var. punctatum LagGrli. Kon. 

 Votensii. Ab. Fcirli. Stockholm 1883, p. GO, t. I, f. 28: quadrangu- 

 laro, angulis aculoo singnlo brevissimo papilla^formi instructis; 

 membrana granulata; cell. 13-150 u.. diam. In Silesia ad ((Liegnitzn 

 (Kirciiner), ot ad «Stockholra» in Suecia (LAr.RRiiEiM) ; otiam 

 locis variis in Amorica borebli (Wolle). H:x)c species distingui- 

 tur a T. mutico, angulis plus minusve acutiusculis et mucrona- 

 tis, in singulis formis aculeo subfirmo armatis. — Var. inerme 

 Flansg. Prodr. p. 2()9 : cellulis quadrangularibus, G-H [^. latis, 3- 

 4 [>: crassis; lateribus leniter concavis, angulis late conicis exa- 

 culoatis; contentu flavo-viridulo. In stagnis imprimis circa uCela- 

 kovio) DohemifB (A. Hansqirg). Varietates hoec 4 ultimai ad Tc- 

 Ivacdra quadrangula vergunt. — Var, ? bifurcatum Wille in 

 Freshw. Alg. U. S. p. 184, t. 159, f. 15-18: 4-angulatum, angulis 

 bifurcatis, acutatis. In America boreali (Wolle). «Cfr. n. 1418». 



2. Tetraedron reticulatum (Reinsch) Hansg. in Hedwigia 1889 p. 18, \m 

 Pobjedrium reficulafum Reinsch Familire Polyedriearum Mono- 

 graphia in Notarisia III, 1888, n. II, p. 498, t. IV, f. 3. — Tri- 

 gonum, lateribus aequalibus subrectis, angulis subrotundatis ; mem- 

 brana tenui, in superficie prominentiis cymatiiformibus subtilissimis, 

 roticulatim intor se conjunctis inducta, 28 u.. diara. 



Ilab. in stagnis pr. uErlangen)) in Franconia Germanias, — • 

 IIoc Tetraiidron tantummodo in speciminibus perpaucis observa- 

 tuin, cortum propriam speciem ropra^sentat et nullo modo varie- 

 tatem T. frigoni format. Qua^ prominentiai cymatiiformes apparent 

 eodem modo productnc sicut prominentiae simillimae in superficie 

 nonnullorum Trochiscirc {Tr. reticularis, sporoides ot al.), qure 

 sunt incrassationos regulariter disposita^ externfe substantiie cuti- 

 cularis: cfr. Reinsch Das Gonus Acanthococcus in Ber. Deutsche bo- 

 tan. Gesellsch. 1880, p. 241, tab. XI, fig. 12, J3, 14, IG. 



3. Tetraedron muticum (A. Br.) Ilansg. in Hedwigia 1888, p. 131 et \m 

 1S89 j). 18, Polycdrium m-uficum A. Braun Alg. unicell. Gen. 

 nova, p. 94, Rabenhorst Fl. Eur. Alg. II, p. 02, Lagorheim Q^]f- 

 vors. K(in. Veten.sk. Forh., Stockholm 1882, n. 2, p. 08, Reinsch 



in Notarisia 1888, p. 499. — Collulis triangularibus, angulis rauticis, 

 lateribus loviter sinuato-excisis. 



//a/>. inter varias algas in paludibus prope ((Neudamrnn (Itzio- 

 soiTN) ot Dresdam Germaniro (L. Rabeniiorst) ; etiam in Rossia 

 (Riabinine). — Forma minus Reinsch in Notarisia 1888, p. 498, 

 P. muticum A. Hr. I. c: lateribus leviter sinuato-excisis, 13-14 



