Falklands, etc.] FLOEA ANTARCTICA. 495 



7. Conferva podagraria, Hook. fil. et Harv. ; filis simplicibus basi intertextis breviusculis fluctuantibus 

 fiexuosis flaccidis flavo-viridibus cylindraceis, articulis opacis elongato-quadratis diametro -j-2-plo longioribus 

 sacculo endochromatis repletis integuinento externo ssepissime incrassato nodoso. (Tab. CXCI. Fig. III.) 



Hab. Cliristmas Harbour, Kcrguelen's Land ; in streams of fresh water, attached to stones or earth. 



Massse unciam latse, nunc lathis extensse, pallide virescentes. Fila flexuosa, f unc. longa, laxe intertexta, 

 opaca, e basi simplicissima, cylindracea, subasquilonga. Articuli cylindracei, saccido endochromatis repleti, sfepis- 

 sime, ob tegumentmn externum morbo affectum, incrassati et nodosi. 



A remarkably distinct little species, forming patches in the water. The threads are densely tufted, curled, and 

 ascending, rather stout in proportion to then - length, but flaccid and somewhat soft in consistence ; they are gene- 

 rally covered at some part of their length with a thickened opaque substance, of irregular form, extending over 

 several of the joints at once, but more or less evidently protuberant on one side of the thread. This appearance 

 seems due to a diseased condition of the outer membrane ; for the sac of endochrome is often seen to be unchanged 

 beneath this thickening, which sometimes increases the filament to twice its usual diameter. 



Plate CXCI. Mg. HI. — 1, plant of the natural size; 2, healthy filament; 3, portion of altered ditto: — 

 highly magnified. 



46. CLADOPHORA, Kiitz. 



1. Cladophoea rupestris, Linn. ; Billw. Hist. Brit. Conf. t. 23. 



Hab. Christmas Harbour, Kerguelen's Land ; on rocks in the sea. 



These specimens are very characteristic of the northern C. rnpestris, which inhabits all latitudes between the 

 Arctic Circle and Mediterranean Sea on the west coast of Europe. 



2. Cladophoea flexuosa ; Billw. Hist. Brit. Conf. 1. 10. 



Berkeley Sound, Falkland Islands ; in the sea. 



Specimens not very satisfactory, but we think referable to this species. The raruuli are secund, and the other 

 characters of C. flexuosa are tolerably evident. 



3. Cladophoea arcta ; Billw. Brit. Conf. Suppl. t. E. 

 Var. centralis, Conferva centralis, Lyngh. et auct. 



Hab. Herrnite Island, Cape Horn, and in the Falkland Islands ; very abundant, in the sea. 

 Decidedly the European plant of the name, which is a native of the German and North Atlantic Ocean. 



4. Cladophoea riparia, Roth; Engl. Bot. t. 2100. 



Hab. Christinas Harbour, Kerguelen's Land ; on rocks near high- water mark. 

 A native also of the German Ocean, the North Sea, and West Indian Islands. 



5. Cladophoea Falklandica, Hook. fil. et Harv.; filis densissime caespitosis flaccidis fiexuosis intricate 

 ramosissimis laete virescentibus, ramis secundariis longissimis subsimplicibus undulatis fiexuosis brevibus 

 secundis, ramulis patentibus distantibus, articulis grauuliferis diametro triplo-quintuplo longioribus. Nobis 

 in Bond. Journ. Bot. vol. iv. p. 294. (Tab. CXCII1. Fig. I.) 



Hab. Berkeley Sound, and St. Salvador Bay, Falkland Islands ; on muddy rocks in the sea, abundant. 



CcBspites 6-10 unc. longi, densissime fastigiati, e filis fiexuosis intertextis gracillimis quasi crinitis formati. Rami 

 flexuosi, elongati : secundarii valde elongati, simplices, ramulis brevibus longioribusve patentibus secundis ornati. 



