482 
man’s description. They occurred as endophytes in different Flo- 
rideae, e. g. Polyides rotundas, Fnrcellaria fastigiata and Chondrus 
crispns. 
Found hitherto in the following places: — Bor do: Klaksvig (H. J.); 
Str.: Thorshavn (!); Nolso(!); Syd: Trangisvaag (H. J.). 
Order PRASIOLACEAE. 
PRASIOLA (Ag.) Menegh. 
159. P. crispa (Lightf.) Menegh. 
* marina nov. subspec. Schizogonium radicans Foslie, Contri 
bution I, p. 128 (e specim.); Gayella polyrhiza Rosenv., Gronl. Havalg., 
p. 936 (e specim.); Ulothrix discifera Batters, A List of the Marine 
Algae of Berwick-on-Tweed, p.258 (e specim.); Prasiola crispa f. sub¬ 
marina Wille, Studien fiber Chlorophyceen, III. Eine submarine Form 
von Prasiola crispa (Lightf.); (?) Ulothrix discifera Kjellm., Om Spets- 
bergens mar. klorofyllf. Thallopliyter, II, p. 52. 
On steep rocks facing the open sea I have several times ob¬ 
served a small alga which often occurred in great abundance and 
was very conspicuous on account of its fresh, light yellowish-green 
colour when dry. Thus, it occurred abundantly on the rocky coast 
between Skandsetangen near Thorshavn and Hdjvig. In order to be 
able to compare it with the rather widely differing species of different 
authors which I have grouped above, and all of which according 
to my opinion ought to be included under this species, I will here 
shortly describe the Faeroese specimens. They consist originally and 
for the most part of cell-filaments (about 10—12 g thick) formed of 
disc-shaped cells which are generally only about one-third as long 
as broad, though they are sometimes met with as long as they are 
broad. Now and then, and most commonly at fairly regular intervals 
rhizoids arise, generally two together, but occasionally also singly; 
the cells whence these arise are mostly longer than the others in 
the filament. These rhizoids are generally connected with the 
mother-cell, and the chromatophore contained in the latter is con¬ 
tinued into the former. But sometimes I have observed rhizoids 
divided into several cells (see fig. 99, i, j) as Wille (1. c. p. 15, fig. 53) 
also mentions having done in a single instance. While, on the 
one hand, the single rhizoids, shown in fig. 99, z, perhaps may be 
regarded, in conformity with Wilie’s opinion, as an abnormal 
formation, on the other hand, the two illustrated in fig. 99, j, appear 
