129 



egredientibus, cellulis subcylindricis medio vel paullo supra medium plus minus 

 inflatis, 6—10,5/^ longis, 2 — 3,5// latis. Chromatophorum ut videtur, unicum pa- 

 rietale pyrenoide instructum. Pili hyalini desunl. Mouosporangia extra cuticulam 

 emergentia solilaria breviter stipitata, stipite unicellulari, rarius in fiiis endophyticis 

 sessilia, ovata, 5 — 6,5/y. longa, 3 — 4// lata. 



In a specimen of Polysiphonia urceolata dredged in Ihe Skagerak oft' Hirshals 



Fig. 55. 



Cliaiitransia emergens. A, filaments growing under the cuticle of the host, seen partly from the face partly 

 in profile (at left): a pericentral cell of Polysiphonia is shown. B, transverse section of Polysiphonia witli 

 the endophyte. C, endopliytic filaments. D and E. cells showing tlie chromatophore and the supposed pyre- 

 noid. F—I, filaments with sporangial branchlets seen in profile, in G an emptied sporangium, in F a new 

 sporangium is formed besides an emptied one. .1— />' 290:1, C I (510:1. 



this little species was found rather abundantly, growing in the outer wall close 

 within the cuticle but never penetrating into the radial walls between the pericen- 

 tral cells. The filaments are very thin, the cells very thin-walled, usually 3—5 dia- 

 meters long; they were in the dried specimens, the only ones I examined, uni- 

 formity rose-coloured and seemed to contain a parietal chromatophore occupying 

 the greater part of the periphery of the cell. In the middle or somewhat over 



1). K. I). Viden.sU, Selslt. Slir., 7. Ux-ldie, iiaturvidensk. (i(< niallieiii. Alil. VII. 1. 



17 



