504 
The specimens referred to this species had as observed by 
Rosenvinge (he.) numerous cell-nuclei. The filaments were about 
30—60 {i thick, consequently, somewhat smaller than those des¬ 
cribed by Rosenvinge, the cells were about 2 — 5 times as long 
as they were broad. 
Generally this species is recorded (e. g. by Kjellm. 
1. c.) as lying loose at the bottom of shallow lagoons; 
and Rosenvinge writes with reference to it (1. c.): — 
»Usually it is not attached«. In the Fseroes I once 
found some plants of it attached to stones in pools, 
near high-water mark, in an exposed locality. The 
base of these attached examples consisted of a rhizoid- 
like cell which at the bottom widened into a small at¬ 
tachment disc (fig. 102). Resides these specimens which 
occurred attached I found considerable quantities of it, 
either lying loose in sheltered localities or entangled in 
other algae, e. g. Almfeltici plicata and Halosaccion ramen- 
taceum and it is possible that it also grows partly at¬ 
tached to the latter plant. 
With regard to its habitat Lyngbye writes (1. c.): 
— »Habitat ad littora Faeroensia, imprimis supra sa- 
bulum, quod in summo refluxus limite saxa maritima 
hie illic obducit, baud frequens; in sinu Qualboensi 
alibique passim«. 
Lyngbye has several specimens of this species in 
his herbarium, but some of the plants under this name have, how¬ 
ever, proved to be Rhizoclonium. 
Found in the following localities: — Bordo: Klaksvig(I); Ost.: Ejde ; 
(Lyngb.); Str.: east coast (Rostr.); Syd.: Kvalbo (Lyngb.), Sumbo Holm (!).§ 
Fig. 102. Chceto- 
morpha tortuosa 
(Dillw.) Kleen. 
Base of the plant. 
100 : 1 . 
RHIZOCLONIUM Kutz. 
184. Rh. riparium (Roth) Harv . 1 . Rosenv., Gronl. Havalg., p. 913, 
Deuxieme Memoire, p. 103; Kjellm., N. I., p. 381 (311). 
var. polyrhiza Rosenv. 1. c. Conferva obtusangula Lyngb., Hy- j 
dropliyt., p. 159. 
1 For practical reasons, I have followed Rosenvinge’s nomenclature and 
not that of Stockmayer given in his monograph: »Ueber die Algengattung Rhizo- , 
clonium« (Verliandlunge.n der k. k. zool. hotan. Gesellschaft in Wien, vol. XI, Wien j 
1890) which was published before that of Rosenvinge. 
