Conjugataj, Desmidiaceae, Onyclioiienia. t9S 



Species raaxinie dnbioe, fortasse Sphcerozosmafi adscribendae. 



15. Sphaerozosma tetraodon Klironb. Berl. Monatsbfir. 1840 (sub Odon- 1892 

 (ella). —- Cellala a iatere quadrangula integr;), a dorso in utro- 

 que latere quadridentata, ovario (((?») viridi ; iong. singuli corpu- 

 sculi 25 a, circ. 



Ilab. prope Holmiam Sueciae. 



10. SphaBrozosma stomatomorphum (Turp.) Rabenh. Fl. Eur. Algar. 1893 

 111, p. 151 Spondijlosmm siomaiomorphum Br(ib. Liste p. 119, 

 n. 1, Archer in Pritcli. Inf. p. 724, Kuetz. Spec. p. 189, hihmia 

 siomatomorpha Menegb. in Linn. 1840, p. 205, n. 4, Scenedes- 

 mus siomatomorphus Kuetz. Synops. Diat. p. 80, n. 8, Br('3b. Alg. 

 Falaise p. CO, n. 1, t. VIII, Achnanlhes slo7naiomorpha Turp. M(^ni. 

 (lu Mus. XVI, p. 295, t. XIII, f. 10. — Fasciis circ. 20 a. latis; 

 cellulis a dorso ellipticis, a latere linearibus, profunde incisis, lobis 

 reniformibus, apice late rotundatis, convergentibus. 



Ilab. in aqua dulci prope ((Falaise» in Gallia (De Brebisson), 

 prope ((Jeziorki)) in Galicia (C. Schliephake teste Grunow). 



17. Sphasrozosma? Ciliatum Itzig. in Rabenh. Fl. Eur. Algar. III, 1894 

 p. 149. — Fasciis longissimis; cellulis ovato-sexangularibus, utrin- 

 que cilio unico pra^ditis; diam. 10-11 [x. 



Ilab. m palude qua) dicitur (( Poritz» ad (( Neudamra » in Borus- 

 sia (Hermann Itzigsohn). 



ONYCHONEMA Wallich [1860] in Ann. Nat. Hist. Ser. III, vol. V, 

 p. li)4 (Etym. onychos unguis et nema filamentum), Cooke Brit. 

 Desm. p. 6, Xanihidiasirum Delp. [1873] Specim. Desm. subalp. 

 pag. 68. — Filamenta compressa; margines inciso-serrati ; cellulae 

 siiigulae profunda; constricta}, insimul processubus subcapilatis di- 

 vergentibus, alternantibus (cornubus) conjuncta^. 



1. Onychonema uncinatum Wall. loc. cit. p, 195, t. VII, f. 7-11. — i89o 

 Cellulis e fronte visis quadrangularibus, profunde constrictis; se- 

 miceilulis superficie cornua 2 oblique disposita gerentibus, utroque 

 apice uncinulis singulis incurvis ppGeditis; e latere visis sublineari- 

 bus leniterque sinuatis vel incisis, e vertice visis cornua diver- 

 gentia et alternatia conspicue monstrantibus. 



Ilab. in Bengalia superiori Asias (Wallich). — Longit. 20-30 

 u., lat. 30-50 a. 



2. Onychonema Nordstedtianum Turn. Journ. Royal Micr. Soc. De- \m 



