Siphoneoj, Hydrog-astraceo). 527 



plici, superiie articulos 2 fereiite, deorsuin rhizoidibus lasciculato- 

 expaiisis, validiusculis iustructo; articulis inferioribus cjlindraceis, 

 pauUo compressis, juvenilibus forma variis sive compresso-cyliu- 

 draceis, sive plano-cuneatis, apice superiori iate expansis ibique 

 foveatis; articulo 1-4, raro ultra, stepius 3 ferentibus, subcostu- 

 latis. Ad insulas pliilippinenses, moluccenses et Anachoretarum. Ar- 

 ticuli inferiores 7 mm. longi, subaiquilati; articuli juniores 5-G 

 mm. longi, 1 mm. diam., articuli cuneiformes 5-6 mm. lati, 500 //. 

 crassi. Utriculi strati subcorticalis clavati, longiusculi, discreti, 

 utriculi corticales superue ampliati, deorsum sensim angustati, 80 

 11. longi. 



19. Halimeda platydisca Decaisne 1. c. p. 102, Kuetz. Species Algarum i2S8 

 p. 504. — Diffusa, ramosa, articulis planis, latis, subcarthaceis, re- 

 uiformibus, integris, vix incrassatis. 



Ilad. in oceano atlantico ad Canarias; an in sinu neapolitano 

 eadem? (Berthold, Schmitz, Faekenberg). 



20. Halimeila discoidea (Esper?) Decaisne 1. c. p. 102, Kuetz. Species i28d 

 Algarum p. 504, J. Ag. Till Algernes Systematik Vlll, p. 89 (no- 

 men), Corallina discoides Esper Zooph. tab 1 (?). — Diffusa, ra- 

 mosa, articulis planis, carthaceis, suborbicularibus vel obovatis, in- 

 tegris. 



Ilab. ad a Kamtschatka)). 



21. Halimeda Lessonii Bory ex Chauv. Rech. p. 125. \2w 



Hah. locus desideratur. — Etiam a Kuetzing Species .\Igarum 

 p. 505 tantum nomine allata et a cl. J. Agardli in Siphonearum 

 Monographia oraissa. 



Familia XX. HYDROGASTRACEiE (Endl.) Rabenh. 



flydroyastreoi Endl. [1843] Gen, Suppl. III, pag. 19, Rabenh. [1868] Fl. Eur. 



Alg. III, p. 265 (id.). 

 Dolrydiacece Rostaf. et Woron. [1877] Ueber Botrydium granulatum pag. 15, 



Kirclmer [1878] Alg. Schles. p. 83, Gooke [1882] Brit. Freshw. Alg. p. 111, 



Wolle [1887] Freshw. Alg. U. S. pag. 151, De-Toni e Levi [1888] Fl. Alg. 



Ven. III, p. 93, Hansg. [1888] Prodr. p. 9j. 

 HydrogaslridecB Lindl. [1847] Veg. Kingd. p. 22. 



Thallus unicellularis, terrestris, e vesicula chlorophylligera epi- 

 ga3a et appendicibas hyalinis, ramosis, rhizoraorphis, hypogajis con- 

 stans. 



Propagatio tum zoogonidiis uniciliatis, tum totius thalli divisione 



