68 



flg. 4). ,ïhey occurred in company with Enteromoryha proliféra, 

 Ulothrix sp. and Calothrix scopulorum. 



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



Gr, or.. Dunholm. 



Fig. 13. Percursaria jyercursa (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 he. 527: 1. 

 I), 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: I. 



Fam. ProtococcacecB. 

 CodioluiKi Al. Br. 

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

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

 C. Nordenskioeldianum K. Rosenv. Deux. Mém. p. 118. 



