912 CoDjugatse, Desmidiacese, Pleurotaeniopsis. 



tis; long. 120 a. lat. 104 u. isthm. 20 u. lat. In turfosis ad «Cser- 

 na, Also-Tatra-Fuered» Hungaric-e (rsTVANFFi-ScHAARSCHMlDT). 



11. Pleurotaeiiiopsis? javanica (Nordst.) De-Toni, Cosmariumjavani- 

 cum Nordst. De Algis nonnullis mus. Lugduno-Batavi p. 7, f. 10. — 

 Oblongo-elliptica, duplo raagis longa quara lata, 152 ^ 72, ad 62 //, 

 crassa, medio profunde constricta, sinu lineari angusto, isthmo 37 

 p. lato; semicellulis e basi lata sensim angustatis, lateribus levi- 

 ter convexis, angulis inferioribus obtusis, apice truncato-rotunda- 

 tis, a latere obovato-ellipticis; massa chlorophyllacea in taenias 

 nonnullas parietales (ut videtur) disposita; membrana scrobiculato* 

 pnnctata. 



Hab. ad Utriculariam flexuosam in insula Java (Herb. 

 Blume). — k Pleuroioeniopside iurgida differt sinu vero angustiore 

 et cellulis in sectione transversa non circularibus, a P/. De-Baryi d\f- 

 fert sinu nec non cellulis superne angustatis, 



12. PleurotaBniopsis ovalis (Ralf^) Lund. Desm. Suec. p. 53 (Cosm.), Co- 

 smaridium oya/e(Ralfs) Hansg. Prodr. p. 191 n. 372, f. 113, Cosma- 

 rium ovale Ralfs Brit. Desmif. p. 98, n. 12, t. XV, f. 9, Archer in 

 Pritch. Inf. p. 733, Er6b. Liste p. 128, Focke Phys. Stud. I, f. I, f. 5, 

 Perty KI. Lebeusf. t. XVI, f. 14, Kirchn. Alg. Schles. p. 148, Ra- 

 benh. Fl. Eur. Algar. III, p. 158, Cooke Brit. Desm. p. 100, t. 38, 

 f. 3, Wolle Desra. U. S. p. 57, t. 13, f. 8-9, Delp. Specira. Desm. 

 subalp. p. 130, t. 10, f. 1-4. — Cellulis raagnis, 150-180 ^; 62 >* 112, 

 ovalibus, compressis, profunde constrictis, diametro subduplo lon« 

 gioribus, ambitu integerrimis vel crenatis, a vertice late ellipticis; 

 semicellulis basi paullo latioribus quam longis, triangulo-rotunda- 

 tis, basi recta, disco punctatis, inargine verrucis margaritaceis, 

 achrois, hyalinis, in series 4 ordinatis. 



Hab. in aquis stagnantibus in Italia (Delponte), Britannia 

 (Ralfs, Cooke), Gallia (Brebisson), Gerraania (Focke, Kirchner, 

 Rabenhorst), Bohemia (Hansgirg), Helvetia (Perty), Norvegia 

 (Nordstedt), Suecia (Lundell), America boreali (Wolle). — ChlorO' 

 phora, ex Lundell loc. cit., lamina^formia, parietalia quaterna. 



13. PleurotaBniopsis? ampla Nordst. Freshw. Alg. of N. Zeal. and 

 Austral. p. 63, t. 6, f, 20 (sub Cosmario), Botaniska Notiser 1887, 

 p. 163 et Notarisia 1888 p. 400, Cosmarium margaritiferum 

 Mask. N. Z. D. tab. 12, f» 28; cfr. N. Z. D. Add. p. 251? — Magna, 

 108-120 « 76-86 [x , 54-60 [j.. crassa, isthrao 32-34 ^j.. lato, sinu angu- 

 sto, sublineari, extrorsum et introrsura arapliato profunde constricta; 

 semicellulis tres partes circuli efficientibus (apice interdum paullulo 



