sd 
12. Ch, Preissii Al. Br. — Neubolland. 
13. Ch. flaccida Al. Br. — Ostindien. 
14. Ch. Drummondü Al. Br. — Nenholland. 
15. Ch. Hookeri Al, Br. — Van Diemen’s Land. 
b. Caulis inermis. 
16. Ch. firosa Ag. — Marianen. 
B. Polysiphonicae propriae. 
Caulis ei saltem inlernodium ramenti unum allerumde compo- 
site lubulosa, corticata, sulcata aut striata. 
a. Strigosae. 
Caulis strigosus vei aculeolatus, aut saltem superne papillis raris 
obsitus. " 
+ Monoicae. 
Ser. Gymnopodeae {Al. Braun). Transatlantiese. 
Internodium basale ramentoram ecorticatum, pellucidum, cetera 
ad apicem corticata, vel alternatim simplieiter et compesite tubuloss. 
Verticilli multiradiati. . 
.17. Ch. Hydropitys Reichenb. — Südamerica; Ostindien. 
18. Ch. nudipes Wallm. n. sp.; caule tenuiter striato, aculeis 
sparsis, diametro caulis paullo brevioribus obsito; involueri spinulis 
acicalaribus, diametro caulis longioribus, numerosis; vertieillis 8—10- 
radiatis, fructiferis divaricatis; internodio ramenti basali ceteris 2—3- 
plo longiore, ınonosiphonico, ecorticato, reliquis inordinate alternatim 
composite et simpliciter tubulosis; hracteis numerosis, 6—8, verti- 
eillatis, subaequalibus, validis, cylindrieis, nueula subrotundo-ovata 
3-—-4-plo longioribus. Monoieca. — Nordamerica. 
19. Ch. foliosa Willd. — Nordamerica. 
20. Ch. Martiana Al. Br. — America, Guatemala. 
21. Ch. ceylonica Klein. — Ostindien, Ceylon, Küste von Malabar. 
22. Ch. polyphylla Al. Br. — America, Missuri, Ohio. 
* Ch. Michauziü Al. Br. : 
ß. Meyenii Al. Br. 
23. Ch. Commersonü Al, Br. — Africa, Isle Bourbon. 
24. Ch. javanica Al, Br. — Java. 
25. Ch. compressa Kunthb. — America. 
26. Ch. brachypus Al. Br. — Ostindien. 
ß. nubica. — Nubien. gt 
27. Ch. Wikströmii W allm. n. sp.; caule tenul laevigatg, sahti- 
Jiter striato, striis rectis, aculeis raris acicularibus, digmetrg ‚canlis . 
