139 



The main filaments were in my specimens 6 — 9 n thick near the hase ; they 

 are repeatedly branched. Opposite branches sometimes occur (fig. 6;") D). Tlie 

 branches are tapering upward, finally only 3,5 — 4 /i thick. The cells of the main 

 filaments are usually 4 — 7 times as long as broad. As shown by Kylin, the chro- 

 matophores have almost the same shape as in Ch. efflorescens; they may also con- 

 tain small refractive bodies which are possibly pyrenoids. 



The sporangia-bearing branchlets are sometimes composed of more than 3 

 cells and transitions to longer filaments may then occur. Sometimes the spoi'angia 

 may also be terminal on long filaments (fig. (55 A). The sporangia are always mono- 

 sporous ; after the evacuation a new 

 sporangium is often formed within the 

 emptied membrane. In some cases the 

 sporangial wall was distinctly lamellate, 

 consisting of two layers at least (fig. 65 A, ZJ) 

 in other cases this could not be observed. 

 The sporangia were in the Danish spec- 

 imens 10 — 14 ;i long, 5,5 — 7,5/^, most 

 frequently 7 « thick. 



The species has been found in depths 

 of 13 to 24,5 meters, growing on Phyllo- 

 phora Brodicei, Desmarestia aculeata, Bucci- 

 imm undatum and Flustra foliacea, in June 

 and July. 



Localities. Ke: VZ, Groves Flak. Lb: 

 F-cene Sund and N. and W. of Fsene. 



/?, cimbrica var. nov. 



Fills principalibus crassioribus, in- 

 ferne 8 — 10,5// crassis, sporangiis partim 

 tetrasporis 18 — 19 ti longis, 10,5 — 13 

 latis, partim monosporis, 11 — 13 fi longis, 

 6—8 fi latis. 



In the Skagerak a Chantransia was found in May, growing on Flustra foliacea, 

 which dilTered from the typical Ch. pectinata by thicker filaments and by the pre- 

 sence of tetrasporangia, but for the rest resembling the latter so much that it must 

 be considered as a variety or form. Some specimens were almost the same as the 

 typical species or only dift'ering by a little thicker filaments, having the typical 

 seriate sporangia-bearing branchlets with monosporangia. But others showed less 

 numerous fertile branchlets bearing at most 2 sporangia, which were larger than 

 the others and containing 4 spores. As I have had very scarce material I cannot 

 say if the two kinds of sporangia may occur in the same individual. At all events 



1.8* 



Fig. ()5. 



Chaiilraiisia pccHnata. From F^iUli; Hell iioar F;riii). .1. 

 end oT long filament with terminal sporangium and late- 

 ral sporangia-bearing branchlets. B, 4-celled sporangia- 

 bearing branchlel. C, lower part of erect filament with 

 descending and horizontally outgrowing filaments. D, 

 erect filament with o])posed branches, li , fragment of 

 a filament of the basal layer witli erect filament. A. B, D 



270 : 1. c :m A. 1-: :«n : i. 



