121 W. B. TIKXEK, FKESH-WATER ALGM OF EAST INDIA. 



bQikgi 15, lat, 65, lat. isth. 9, crass 15 ,«. T. XIV, f. 14 X 330, after Wallich 

 Mscr. 251 B. 



Baboosole, 22 Oet. 1855, <i. C. \V. 

 Y piilohelluni, ii. v. Apice productum, truncato-crenatum, apud angulos trieornutum, 

 cornubus brevibus crassis aeutis vel emarginatis; basi infiatum, infiatione summa 

 mucronata. 



Long. 42—50, lat, 70—75, lat, isth. 15 ,w. T. XVI, f. 14. 

 n typica, Wille 1. c, long. 50, lat, 57 ju, ex ('tfiru/arin ste.llari, from the Hima- 

 layas, G. von L. 



85. S. Bcngaleiisc, n. sj». 8. submagnum, plus 1 1 /2~pl° latius quam longum, compressum; 

 semicellulis cuneatis, dorso leniter convexis, ventre inHatis; in angulis 2 longe pro- 

 duetis; proeessubus eonvergentibus, margine serrato-dentatis apice tritidis; dorso et 

 apice semicellularum seriebus 3 verrucarum tranverse ordinatis, a vertice visibilibus; 

 semicellulae in basali parte utroque latere 4 vel 8 proininentiis brevihus emarginatis 

 verticaliter (2, 2) positis ornata3j membrana reliqua laeyi; sinu brevi, cuneato-rotundato, 

 externe ampliato. A vertice visum longe fusiforme. 



Long. 53, lat. 87, lat. isth. 11, long. proc. 25, crass. 18 ju. 



Forma minor; long. 31, lat, 46 [*. T. XIV, f. 13 X 300 (also in Wallicij 

 Mscr. No. 251 A.). 



86. S. Sunderbundense, n. sp. S. mediocre, circ. 5-ta parte longius quam latius; semi- 

 cellula: cuneatae doi-so verrucis emarginatis praedita^ ventre sinuata 1 ; in processus 3 

 angulis producta\ proeessubus crassis vcrrucose striato-dentatis paullo eonvergentibus 

 apice 3-aculeatis; centrali parte frön dis Uevi: sinu brevi, rotundato. A vertice visum 

 triangulare, centro coronä verrucarum ornatum, proeessubus apud bases seriebus 2 

 verrucarum vel dentium instruetis; a basi visum centro paullo rugatum non dentatum. 

 Stau. pseudosebaldo Wille, Norg. Desm. p. 45, t, II, f. 32 proximum? 



Zygospora globosa, spinis longis rectis attenuatis basi conicis apice bi-furcatis 

 (vel 4-ramosis) margine 7 visibilibus ornata, 



Long. 40, lat. 42 — 47, lat. isth. 10, Zygospora dimetro 25, long. spin. 16 — 17 

 ju. T. XIV, f. 18 X 400; Zygospore, etc. after Wallich Mscr. No. 228. 



87. 8. Sonthalianum, n. sp. S. mediocre, circ. 1 ' .,-plo latius quam longum, bieornutum 

 vel 3-angulare; semicelluhi' late triangulares, dorso et ventre convexo-emarginata 1 ; 

 centrali parte frondis la3vi; proeessubus margine inferiore rugosis, superiore basi emar- 

 ginato-verrucatis apice dentatis finibus furcatis; sinu brevi, acuto. Processus leniter 

 convergentes. A latere visum 2 — 3-gonum; f. 2-gona fusiformi apice verrucis in series 

 duas, et f. 3-gona laterilnis incavatis apice verrucis triangulatim positis (centro Iscvi), 

 sujtra processus aeque verrucosum, ornata, Zvgospora ovalis, spinis longis rectis atte- 

 nuatis, basi conicis, apice 4-ramosis, apud marginem circ. 9 visis, armata, 



Long. 40—48, lat, 53—69, lat, isth. 10; Diam. zygosp. 35 X 45, long. spin. 22 

 //. T. XIV, f. 27 X 400 (also in Wallich Mscr. No. 227, 230, 231; zygosp. after 

 Wallich No. 229). 



The 2-angled form in vert, v. is much like S. hicorne Hauptfl. (Zellmemb. 

 Desm. p. 37, t, III, f. 24), but that is punetate and the verruca' do not extend in 



