384 Conrervoideae, Pithophoracea?, Pithophora. 



Hab. in oceano atlantico ad littora Floridte et insularum In- 

 diae occidentalis; ad «Pernarabuco» America3 australis, in oceano in- 

 dico ad aPort Natal » (Areschoug), ex insula Mauritii (Dickie). — 

 Formas quas eetate diversas considerat cl. J. Agardli ut species di- 

 versas proposuit cl. Duchassaing in Anim. rad. des Aatilles p. 28, 

 h. e. Cepkalothrix cepltalotes, Cephalothrix minor, Cephalo- 

 thrix Uinbraculum et Cephalothrix annulaia. 



Familia XI. PITHOPHORACE^ Wittr. 



Pif.hophoracece WiLtr. [1877] On the Develepment and systematik Arrange- 

 ment of the Pithophoraceiie, On a new Order of Algae p. 42 et 47, Cooke 

 [1884] Brit. Freshw. Alg. p. 146, Wille [1887] Algol. Mittheil. p. 503. 



Pithophorime Wolle [1887] Freshw. Alg. U. S. p. 129. 



Thalius duabus partibus distinctis compositus: 1 parte cauloi- 

 dea ex acineta geminata sursura evoluta, propagativa, semper (fere) 

 ramosa, ramis e cellulis sufFultoriis paullo infra apicem egredienti- 

 bus: 2 parte (morphologice non pliysiologice) rhizoidea, ex acineta 

 gemirjata deorsum evoluta, semper fere sterili et sim.plici, plerumque 

 unicellulari. 



Propagatio acinetis; acinetae quiescentes sajpissime urculiformes, 

 solitarifB, bipartitione cellularum [^artis thalli cauloideoe formatas; (cel- 

 lula3 singu]a3, matres acinetarum) parte superiore tumefacta et con- 

 tentu chlorophyllaceo farcta, acinetas singulas et cellulas singulas 

 steriles subacinetas gignunt. Acineta3 germinantes in binas plerum- 

 que cellulas divisa;, cellula altera in partem thalli cauloideam, al- 

 tera in partera thalli rhizoidea denique evoluta. 



PITHOPHORA Wittr. [1877] On tlie Devel. and syst. Arrang. of the 

 Pithopli. pag. 47 (Etj-ra. a pithos doliolum et phoreo fero) Wolle 

 Fieshw. Alg. U. S. p. 140, Cooke P>rit. Freshw. Alg. pag. 140, 

 — Character idem ac Famili^e. 



Scctio i. Isosporae Wittr. l. c. p. A^: Acinetae omnes conformes, intercalares 

 cylindraceu3 vel orcuheformes, terminalcs cylindraccoe vel orculfeformes, 

 snperne conicie et apice s:,epe rotundat;e. 



1. Plthophora sumatrana (Mart.) Wittr. On the Devel. and syst. Ar- lon 

 rang. of the Fithoph. pag. 48, t. I, f. 1-3, t. IV, f. 1, Hedwigia 

 1878, n. 119, Cladophora siimatrana Martens Preuss. Exped. 

 p. 20, t. 2, f. 2. — Subvalida; (ilaraento principali partis thalli 



