Siphcneoe, Detbesiacfise. 423 



1. Hallcoryne Wrlghtli Harv. in Proceed. of Americ. Acad. vol. IV, 1085 

 p. 333, J. Ag. Till Algenies Systeinatik VIII, pag. 159. — Tenui 

 crusta calcarea induta, paulli.sper cinerea, 12-14 mm. alta, cras- 

 sitie pennam scriptoriam superne fere sequaus ; ramis in singulis 

 verticillis ad 12, nunc forsan pluribus; aplanosporangiis legumini- 

 formibus, in verticillo normaliter 12, invicem liberis, pedicello ipsis 

 multo breviore insidentibus et ab eo strictura evidente separatis, 

 in verticillis supremis magis juvenilibus a pedicello vix nisi stri- 

 ctura parum conspicua distiuctis. 



Hab. in scrobiculis sordidis ad ins (( Loo-Choo)) (C. Wright). 



?PLEIOPHYSA Sond. in F. Muell. Fragm. Phytogr. Austral. suppl. 

 (nomen), (Etym. pleios plus et phi/sa vesica), J. Ag. Till Alger- 

 nes Systematik VIII, pag. 159 PolyphyscB sp. Kuetz. — Habitu 

 et forma aplanosporangiorum Halicorynes ; aplanosporangia sim- 

 pliciora, pedicello destituta, immediate stipiti affixa. 



1. Pleiophysa spicata (Kuetz.) Sond. 1. c, Polyphysa spicala Kuetz. 10S6 

 Tab. Phyc. XVI, t. I, f. 2. — Character generis ; stipite erecto, 

 simplici, articulato; ramulis vel vesiculis cuspidatis, verticillatis, 

 verticiliis in spicam adproximati. 



Hab. ad oras Nova3 Caledoni:ft (Vieillard), ad oras Novoe IIol- 

 landi» (Sonder). — J. Agardh I. c. sequentia docet: Planta hsBC 

 mihi non nisi icone a cl. Kuetzing data cognita; qualein hanc de- 

 lineavit Kuetzing, habitu et forma aplanosporangioruin potissimum 

 cum Haiicoryne eam convenire putares. Verticilli invicem paul- 

 lisper magis distantes videntur. Aplanosporangia in verticillis sin- 

 gulis forsan pauciora; prajcipuam vero difTerentiam genericam in 

 aplanosporangiis simplicioribus, pedicello destitutis, immediate sti- 

 piti affixis quaererem. 



Pamilia XV. DERBESIACEiE Thur. 



Derbesiacece Thur. [18501 in Ann. Scienc. Nat. III ser. tom. XIV, p. 231 {Der- 

 besicce), Kjellm. Alg. of the Arctic Sea p. 316, Hauck Meeresalgen p. 475, 

 Ardiss. Phyc. Medit. II, p. 158, De-Toni e Levi FI. Alg. Ven. III, p. 90. 



Thallus unicelluiaris, filiformis, radicans, ScTpius ramosus ; zoo- 

 gonidia intra zoogonidangia lateralia a cetero thallo per septum dis- 

 creta orta, corona ciliorum instructa, 



