73 



The sporangia are cut off in the ordinary vegetative cells, in a similar manner 

 as in the genus Erythrotrichia, by a more or less oblique curved wall. The for- 

 mation of sporangia takes place usually in the inner, intercalary cells, more rarely 

 in the terminal cells. The orientation of the wall is not always the same; usually 

 the sporangium is cut out at the proximal end of the cell, apparently very seldom 

 at the distal end; but 

 the wall is not seldom 

 longitudinal , particu- 

 larly in short cells from 

 which a branch is given 

 off (fig. 12). The spores 

 are in the fully deve- 

 loped state nearly glo- 

 bular, about 4 « in dia- 

 meter; they have more 

 granular contents than 



the vegetative cells and 

 often show a distinct 

 parietal chromatophore 

 (fig. 11 C, A fig. 12). 



It is evident that 



the above described plant cannot be referred to the genus Erythropeltis on account 

 of the structure of the frond. It differs further from E. discigera var. Flustroi Batters 



by its much smaller spores, while the spores in 

 Batters' plant are about 9 p. in diameter. 



Localities. Sk: Mollegrund ofif Hirshals, 11,5 to 15 meters, 

 on Polijsiphonia urceolata, August. 



Fig. 11. 



A. young plant seen from above. B~D , more devel- 

 oped ))lants with sporangia seen from above. E~l , plants in vertical section, 

 F-I. with sporangia. A-E :!90 : 1. F-I ll'il) : 1 



Erytlirocladia irregularis. 



2. Erytlirocladia subintegra sp. nov. 

 Thallus minutus suborbicularis. Fila sat regu- 

 lariter radiantia, plerumque fere ad apices latera- 

 liter connata, cellulis terminalibus tamen inter se 

 plus minus discretis. Ramificatio fit in cellulis ter- 

 minalibus, sfepe dichotoma. Cellulse plerumque cy- 

 lindricoe, lat. 3 — 4( — 5) long. 8 — 10,5 /j. Sporangia 

 in parte proximali aut distali cellularum orta dia- 

 metro c. 4 ( — 5) [jt. 



In company with the foregoing species I found some individuals of a species 

 evidently nearly related to it, but showing however such differences that I think 

 it best to consider it as a distinct species. It is more regular, more or less approa- 

 ching to the orbicular form, and consists of more regularly radiating, closer to- 

 gether and a little thinner threads (3 — 4 fj.), which are most often united almost to 



D. K. U. Vidensli. SelsU. Skr., 7. Riekke, natui vidensk. og- mathem. Aid. VII. 1. 10 



Fig. 12. 



Erytlirocladia irregularis. Plant with spor 

 anaia seen from above. 730:1. 



