287 
New Arrangement of the Algce. 
laris, rivularis, flacca, implexa, Dillw. ; fucicola, Veil.; Linum, FI. 
Dan. ; aerea, aegagropila, crispata, Roth ; fracta, sericea, gloinerata, 
crystallina, rupestris, flavescens, nigricans, Roth ; Wormskioldii, 
FI. Dan.; castanea, Dillw.; velutina, umbrosa, Byssus iolithus.) 
37* Hydrodictyon, Fila articulata membranacea, in formam arti- 
culi connexa, viridia. Embryo, matri similis, in quovis reticulo in- 
vaginatus. (Conf. reticulata.) 
38. Zygnema. Fila articulata membranacea simplicia viridia, de- 
mum per tubulos breves transversales conjugata. Semina solitaria, 
singulis articulis post copulationem inclusa, (Conf. genuflexa, de- 
cimina, quinina, nitida, bipun ctata.) 
/S. Frons plana. — Sect. V. Homalogonata. 
30. Diatoma. Fila articulata simplicia crystalliformia, immediate 
copulata, tandem articulis solutis angulo alternatim cohaerentibus.^ 
Conf. flocculosa, FI. Dan.) 
40. Fragilaria. Fila articulata plana fragilia, articulis solutis an- 
gulo non alternatim cohserentibus. (Conf. striata, Eng. Bot. ; li- 
neata^ Dillw. ; pectinalis, Miih.) 
B. Gelatinosa. — S ect. VI. Tremelloidata. 
41. Batrachospermum. Frons gelatinosa, articulata ramosa, ra- 
mulis ad genicula verticillatis. Capsulae globosae intra verticilloa 
sitae. (Conf. gelatinosa, atra, Huds.) 
42. JDraparnaldia. Frons gelatinosa articulata ramosa, ramulis 
fasciculatis penicilliformibus. Granula in articulis sparsa. <Conf. 
chara, Roth ; mutabilis.) 
43. Mesogloiay Ag. Frons gelatinosa elongata ramosa, filis e com- 
rnlini frondis axi exeuntibus ramosis, articulatis, capsuliferis farcta. 
44. Chi^tophora. Massa gelatinosa elongata vel globosa, filis ra- 
mosis articulatis farcta. (Rivularia endivieefolia, Roth,; elongata, 
pisiformis.) 
45. Linckia. Massa gelatinosa elongata vel globosa, filis simplici-. 
bus rectis acuminatis articulatis vel sub-continuis farcta. (Rivularia 
atra, angulosa, dura, Roth.) 
46. Nostoc. Massa gelatinosa difformis vel globosa, filis simplici- 
bus curvatis moniliformibus farcta. (Tremella Nostoc, verrucosa; 
Ulva pruniformis, pisiformis.) 
47 . Alcyanidium. Massa gelatinosa elongata ramosa olivacea, in- 
tus cellulosa, capsulas solitarias gramdiferas includens. (Ulva dia- 
phana, flavescens, Huds.) 
48. Palmella. Massa gelatinosa subhyalina, granulis solitariis 
globosis farcta. (Batrachospermum myurus, Decand.; Byssus bo- 
try oides, L. ; Tubercularia rosea, Pers.) 
49 . Echinella, Acliar. Massa subgelatinosa, granulis solitariis 
cuneatis elongatisque farcta. 
We cannot conclude this short notice, without expressing a 
hope, that our celebrated algist Dawson Turner, now that his 
great work on Fuci is finished, will be induced to publish his 
views in regard to their arrangement. 
