108 



9. Chantransia stricta sp. nov. 

 Discus basalis unistratosus e filis lateialiter confluenlibus composilus. Fila 

 erecta pauca e centro disci egredientia simplicia vel siibsiniplicia, stricta, visque ad 

 1 mm. el ultra louga, (5 — In crassa, ramulos sporangiferos per totam fere longitudi- 

 nem gerentia; cellulte 3 — 4,5 diametra lougse, chromatophorum parietale, pyrenoide 

 instructum continentes. Ramuli sparsi, nonnunquam secundati, erecti, uni — bicellu- 

 lares, monosporangia 2 — 3 gereutes, nounuuquam piliferi. Sporangia anguste ovata, 

 (12— ) 13—14// longa, (5— ) 6— 7 lata. 



This species is characterized by its straight 

 erect filaments which are unbranched or bear- 

 ing at most a single branch of the same kind 

 as the principal filament. The direction of 

 this is usually not at all influenced by the 

 numerous lateral fertile branchlets, one of 

 which is usually placed on nearly every one 

 of the cells from the base to the top. The 

 branchlets are situated on all sides of the 

 filament, but not infrequently a number of 

 consecutive branchlets are placed on the same 

 side (fig. 36 C). Most of the branchlets are 

 unicellular and bear 2 sporangia, but two- 

 celled branchlets are also frequent, while such 

 consisting of more than two cells are rare. 

 In well developed filaments sessile sporangia 

 do not usually occur, but they may be found 

 in feebly developed filaments (fig. 36 A at left). 

 Hairs are often met with at the end of the 

 branchlets and marks of decayed hairs are 

 frequently visible. The sporangia are rela- 

 lively narrow, twice as long as broad. As I 

 have only had occasion to examine a small 

 number of dried specimens, I cannot give 

 any information on the development of the 

 basal layer. 



As far as I can see, this species cannot 

 be identified with any of the more exactly described species. The nameless spec- 

 ies described by Reinsch (Contrib. ad Alg. et Fung. 1877 p. 38 pi. XII fig. 1 — 2) which 

 also has unbranched filaments, (setting aside the branchlets) differs among other 

 things by its much smaller dimensions, shorter cells, less erect branchlets and more 

 roundish sporangia. 



Only found in small quantity together with other species of Chantransia on 

 Polysiphonia uigrescens in depths of 7,5 to 11,5 meters, in July and August. 



Localities. Km: BH off Gjerrild Klint. — Ks: D, N. of Isefjord. - Sa: AH' off Fyens Hoved. 



A 



Fig. 3(;. 



Chantransia slricta. A. lower part of a plant, B. I'rag- 

 meiit olYthe middlemost part, and C, the upper part 

 of the same plant. :i50:l. 



