Coiijugatie, DesmidiaceiP, Sphaero^osma. 793 



dochromate \n unoquoque lobo corpusculuin globosum, centrale, sin- 

 gulum, laite coloratum fovente. 



Hab. m stagnis ad Dnblinum in Hibernia (Arciirr), prope « Neu- 

 damm» in Borussia (iTZinsoiiN et Rothe), in Silesia (Kirciiner), 

 ad ((Walchseen in Tyrolia (Dk Hrufler), in Italia (De-Toni et 

 Lrvi), Suecia (Lundell), Norvegia (Nordstedt), Dania (Jacobsen) 

 et Boheraia (Hansgirg), nec non in Sibiria (R. Doldt). — Teste 

 Istvaitffi-Schaarschmidt in Notarisia 1886 pag. 241, Sphccr. ham- 

 bumioides (Wittr.) Lundell De Desmidiaceis Suecia) pag. 92, huc 

 pertinere videtur. — Adest forma duplex Schaarsch. in Notarisia 

 loc. cit., e divisione imperfecta orta. Dimens 23 ^ 12. In turfosis 

 «Csorba» et prope (cNameszto)) in Hungaria. 



10. SphaBrozosma pygmaeum (Archer) Rabenh. FI. Eur. Algar. III, 1887 

 p. 150, Cooke in Grevillea IX, p. 39 et Brit. Desm. p. 5, t. III, 



f. 5, Co^mayHum 'p>/gma;um Archer in Micr. Journ. 1864, p. 174, 

 t. VI, f. 45-49. — Minimum, leve tubo angusto, hyalino, inclusum, 

 a latere biscoctiforme, a vertice oblongo-subellipticum, 9:3 8; lo- 

 bis oblongo-tetragoniis; zygotis globosis, glabris. 



ITah. in stagnis pr. Dublinura Hiberniae (Archrr), ((Barraonth» 

 in Carabria AngliaB (Cooke). 



11. Sphaerozosma pulchrum Bailey in Ralfs Brit. Desraid. pag. 209, i888 

 t. XXXV, f. 2, Wolle Desra. U. S. p. 29, t. IV, f. 1-2. Spondy 

 losium palchrum Archer in Pritch. Inf. p. 724, Lundell Desm. 

 Suec. p. 93, t. V, f. 17. — Cellulis oblongo-quadrangularibus, diarae- 



tro duplo brevioribus, acute incisis, arcte connexis ; lobis oblongis, 

 rectis, apice rotundatis; isthrais nullis; vagina raucosa, arapla, di- 

 stincta. 



Hab. in aquis stagnantibus in America (Bailey) nec non in 

 ((Norby Skogn prope Upsaliara et ad <i Bergsbrunna» in U[dandia 

 Suecia3 (Lundell), in lacu Caudiano Italise borealis (J. B. D&l- 

 ponte). — Var. trilobum Joshua Burrn. Desraid. with descrip. 

 of new species in Journ. of Bot. vol. XXI, pag. 635, January 1886, 

 tab. XXII, fig. 1-2 et in Notarisia: cellulis triplo latis quara 

 longis, breviter utrinque convexis, forraa irregularibus, a vertice 

 conspectis 3-Iobatis, lobis basi valde elongatis; isthrao nonnihil 

 elongato; dimens. 28-40 y.., crassit. 45 a., Isthin. latit. 10 a. Ad 

 ((Rangoon)) Birmania'. — Var. brasiljense Nordst. in Wittr. et 

 Nordst. Alg. aq. dulc. exsicc. n. 369 et in Botaniska Notiser 1880, 

 pag. 119, a forma America? septentrionalis, cfr. Ralfs Br. Desm. 

 pag. 209, lab. XXXV, f. 2, differt isthmo angustiore; soraicellu- 



