Mj^xophycese, neterocj^sfcidese, Nosfcoc. 425 



— Konna crystallophora Reinsch 1. c. : crystallis ibrri oxyduti ra- 

 (lialiter dispositis inclusis. 1'assini cun typo. 



57. Nostoc heterothrlx Zell. in Hedwigia 1873, pag. 171. — Strato 995 

 irregulariter expanso, olivaceo-viridi ; filis levitcr Oexuosis, in;e- 

 qualibus, alteris ;erugineis; articulis globosis 3,5-5 [x. diam., mem- 

 brana vix conspicua, iiyalina, alteris fuscis, membrana evidcnti 

 colorata; articulis globosis vel ellipticis, ad 13 [x. diam.; hetero- 

 cystis ellipticis, ceteris cellulis paulo majoribus. 



Ilah. « Pegu » ludi;» in rivulis et fluviis (Kurz). 



58. Nostoc IJmosum Zell. in Hedwigia 1873, p. 171. — Strato oli- 996 

 vaceo-fusco, terrestri, tenui, infinite expanso, filis brevibus, rectis, 

 dense implicatis; filis leptotrichoideis tenerrimis articulatis hya- 

 linis intermixtis; articulis 4,5-7,5 [j-. diam. auctis globosis v. elli- 

 pticis arcte connexis, granulis viridibus; peridermate hyalino achroo ; 

 heterocystis sphaericis duplo majoribus. 



Bab. « Pegu » Indi;e in limo ripas obducenti (Kurz). 



59. Nostoc minimum Currey On some Brit. Freshw. Alg. in Mi- 997 

 crosc. Journ. Vol. VI, p. 21G, Tab. IX, f. 27. — Thallo ellipsoi- 

 dali minutissimo. 



Hab. in stagno prope « Paul Cray » in ditione Kent Angli» 

 (Currey). 



60. Nostoc polysporum Pteinsch Freshw. Alg. fr. Kerguel. Isl. p. 208. 998 



— Thallo sph[erico, piriformi, tegumento 3-4 mm. diam. (peri- 

 dermate?; crasso, hyalino, distincte stratoso; trichomatibus laxis, 

 contortis, pallide serugineis; articulis sphoericis, arcte conjunctis, ad 

 2,8 {X. crassis, post divisionem transverse ellipticis; heterocystis 

 numerosissimis, sphairicis, ceteris cellulis duplo majoribus, 4-5,8 

 \L. crassis, membrana crassa. 



Hab. inter alias algas fluitans iu ins. Kerguelensi (Eaton). 



61. Nostoc purpureum Dickie Algge of Mauritius in Journ. of Liun. 999 

 Soc, Bot., 1873, p. 201. — Thallo purpureo, 1 cm. lato, subgloboso; 

 trichomatibus flexuosis; articulis plano -convexis; heterocystis 

 sparsis, globosis, ceteras cellulas magnitudine superantibus. 



Hab. iii rivulis montuosis in ins. « Mauritius » (Pike). 



62. Nostoc rhaBticum Briigg. — var. a. calcareum Briigg. Biindn. Alg. 1000 

 p. 262, De Wildem. Cat. Alg. suisse p. 17. — Articulis 3,5-5, \l. 

 diam., sphsericis, olivaceo-viridibus, nucleo centrali compresso no- 

 tatis; heterocystis 6-8 [j,. diam.; trichomatibus s;epe e 2-4 paral- 

 lelis arcte consociatis; strato olivaceo-brunneo v. l)runneolo-paIle- 

 scente; pcridermide crasso. 



