68 



fig. 4). They occurred in company with Enteromorpha proliféra^ 

 ülothrix sp. and Calothrix scopulorum. 



Gr. occ: Igdlorsuit (L. K. R.). 

 G r. or.. Dunholm. 



Fig. 13. Percursai-ia percursa (Ag.) K. Rosenv. 



a, a fragment of a filament with ripe sporangia, in the prominent part of 



the walls of the sporangia, the opening is going to be. 527 : 1. 



b, a fragment of a filament showing the opening of two emptied sporangia. 527: 1. 



c, a fragment of a branched specimen with a rhizoid to the right. 267 : 1. 



d, e, fragments with rhizoids. 267 : 1. 



Fam. Protococcaoeœ. 

 Codiolum Ai. Br. 

 C. gregarium Al. Br., Algarum unicellularum genera nova et 

 minus cognita, Lipsiae 1855, p. 19; Jonss. Icel. Alg. p. 338—340; 

 C. TS'ordensicioeldianum K. Rosenv. Deux. Mém. p. 118. 



