154 W. B. TUBNER, FRESH-WATER ALG.E OF EAST INDIA. 



These percentages of species may be usefully compared witli the rather remarkable 

 resulta given by Dr. K. Boldt, in Desraidieernas utbredning - i Norden, p. 109, 1887. It 

 appears that the percentages of Micrasterise, Knastra, Docidia, and Xanthidia are greater 

 in the warmer cliinates; while Closteria, Gosmaria and Penia give a higher percentage in 

 the Arctic & Sub-artic regions; the percentage of Staurastra (exeepting Spit/.bergen and 

 Beeren Island) is about the sarne as in India. 



Ord. III. ZYGNEME^E, Menegh. Organogr. p. 33, 1838. 

 Gen. 1. Zygnema, Agdh. 

 » 2. Zygogonium. Kutz. 

 » 3. Spirogyra, Link. 

 The gatherings include fragments of plants belonging to these genera, but, except 

 one doubtful Spirogyra, all are infertile and indeterminable. 



Ord. III. MESOCARPEtE, De Bart. 

 Gen. I. Mesocarpus, Hass. 1843. 

 1. M. pamilus (Hass.) De Bary, Conjug. p. 80, t. II, f. 15; Hass. Alg. p. 169, t. XLV, 

 f. 2, 3; 31. splendens, Kutz. Tab. Phyc. V, p. 1; Sp. Alg. omissus? Sphasrocarpus 

 parvulus Hassall Annals v. XII, p. 187, t. VII, f. 16. 

 Northern India. 



Gen. II. Staurospermum, Kutz. Phyc. Gen. p. 278, 1843. 

 1. S. sp. 



Central India. 

 Fragment in which the conjugation of two threads is incipient. 



Cohors 2. SIPHONEiE (Gkev.), J. G. Agardh. 



Ord. I. CHARACIE^E (Nag.) Wittr. Gotl. Sötv. p. 32. 



Gen. 1. Ophiocytium, Nag. 1849; Closferidium. Reinsch 1888; 



Reinschiella, De Toni 1889. 



1. 0. eochleare (Eichw. 1847) Braun 1855, Alg. unic. p. 54: Spirodiscus cochlearis, 

 Eichw. Nachtr. Inf. p. 301, t, 8, f. 4; fide Wittr. 



2. 0. majus Naeg. (Einz. Alg. p. 89, t. IV A, f. 2, 1849). 



Northern India. 



Gen. 2. Characium, Braun in Krz. Sp. Alg. p 208. 

 1. V. angnstum, Braun Alg. Unic. p. 36, t. III Ii. 



Northern India, on decaying Alg». 



Gen. 3. Hydrocytium, Braun Alg. Unic. p. 24. 

 1. H. macrosporum, n. sp. H. dimensione irregularis; cellula ovata, apicibus acurninata 

 (fere ut in //. acuminatum, Braun) sed tubo parvo vcl foramine apieali instructa; 

 sporis 2 — 4 magnis longe ovalibus includentibus. 

 Long. 50, lat, 39 ju. 



58, 45 



» 



65, 52 



Spores 39, 19 



