108 L- KoLDERUP Rosenvinge. 



occur. The specimen figured had 4—6 pericentral cells; the number 

 was greatest in the main axes. 



Loc. Along the East side of Koldewey Island, ca. 15 meters; off Cape 

 Bismarck Peninsula. 



Fam. Delesseriaceœ. 

 Delesseria Lamour. 



14. D. sinuosa (Good, et Woodw.) Lamour. 



K. Rosenviiige (1893) p. 808, (1898 I) p. 27; Jonsson (1904) p. 11. 



The collection contains a considerable number of well-developed 



specimens of this species. They attain a length of 25 — 30 cm. or 



even . more and are also broad, and they belong to the f. typica. 



Some of them bear at the base a considerable number of narrow 



shoots which had attached themselves on gravel or fragments of 



shells. One specimen was attached to a barnacle. A number of 



the specimens seem however to have been loose-lying on the bottom. 



Specimens collected in July and August showed ripe tetrasporangia, 



in small marginal leaflets, or cystocarps. 



Loc. Along the East side of Koldewey Island, 19—23 meters; along Cape 

 Bismarck Peninsula; off Cape Bismarck; Danmarks Havn; off Baadskæret; the 

 Ьаз^ off Vesterdalen. 



Fam. Rhodymeniaceœ. 

 Halosacciou Kütz. 



15. H. ramentaceum (L.) J. Ag. 



к. Rosenvinge (1893) p. 825, (1898 I) p. 43; Jonsson (1904) p. 12. 



Only 3 specimens have been met wàth in the collection. They 

 have a single set of unbranched branches, are provided with hyaline 

 hairs but are sterile. 



Loc. The bay off Vesterdalen, in at most 4 meters depth. 



Fam. Rhodophyllidacece. 

 Euthora J. Ag. 



16. E. cristata (L.) J. Ag. 



K. Rosenvinge (1893) p. 813, (1898 I) p. 28; Jonsson (1904) p. 13. 



A number of specimens, all epiphytic, mostly on Chcetomorpha 

 Melagoniiim and Delesseria sinuosa, further on PhijUophora Brodiœi 

 *interrupta and Turnerella Pennyi, are contained in the collection. 

 They all belong to f. angustata. The largest specimens are 5 cm. 

 long. Ripe tetrasporangia and cystocarps occurred in specimens 

 collected in August and September. 



Loc. At Koldewey Island; Danmarks Havn. 



