122 '•• Ivoi.i'iiu !■ HosKNvrNCii;. 



Leptoneiiia Reinke. 



37. L. fasciculatum Hciiike. 



K. Hüsenviiij,'c (18!i;i| p. .S79; Jonsson (1!I04) p. :$■'). 



Elachisla fascicalata iHeinke) Gran, K. Hosenvin/<e (l.SitS 1) p. 'A'). 



Attached to Lithothamnion glaciale, moslly f. subcy lindr icu K. 



Roseiiv., some filaments f. iincincda Keinlce. 



Lo c. Kiilriiiu'o lo Ihc Iiarboiii-. 



Fani. Ectocavpaceæ. 

 Ectocarpus Lyngb. 



38. E. (Pylaiella) littoralis (L.) Lyngb. 



K. Hu.senvinge il.Sil.Ji p. .S81. i l.S!)8 I) p. T.J: Jon.sson (lî)04) p. 35. 



Found in various localities, mostly loose and in company willi 

 oilier loose algæ, in particular Stictyosiphon tortilis. Also found 

 allached to slipes of AUiria. The laller specimens ^vere very bran- 

 ched with secund branches, the others had often opposite branches. 

 Unilocular sporangia were met with in plants collected in July and 

 August. 



Loc. Kast Side of Ivoldewey Island; alont* ('.ai)C Bismarck Peninsula; 

 Danmarks Havn; bay oll" Vesterdalen, al most 4 meters; Cape Amelie, in 

 clumi)s in the ice. 



39. E. ovatus Kjellm. var. tenuis K. Rosenv. 



K. Rosenvinge ( hSi)<S Ii p. 77; Jonsson (1904) p. 37. 



Small ca. 1 mm. high plants were found epiphytic on Tiirnerella 

 Pennyi and Lithothamnion glaciale. They bear plurilocular sporangia 

 which are mostly alternate or secund; opposite sporangia however 

 also occur. The upright filaments are often unbranched (comp. 

 Jonsson 1. c). 



Loc. Danmarks Havn, and the entrance to the liarbour. 



40. E. maritimus (Kjellm.) K. Rosenv. comb. nov. 



Chœtophora maritima Kjellman (1877; p. 51, pi. ^' fig. 15—16. 

 Pilinia maritima (Kjellm.) K. Rosenv. (1893) p. 932. 



In company with Calothrix scopnlorum and other littoral algæ 



a small, branched filamentous alga was met with, occurring partly 



in a rather elongated partly in a shorter and denser form. The 



latter agrees pretty well with Chœtophora maritima Kjellm., which 



has been referred by me to the genus Pilinia. On the other hand 



the more elongated plants remind one so much of Ectocarpus liici- 



fugus Kuckuck, which has been so carefully described by its author 



(Kuckuck 1897, p. 35, pi. XI — XII), that the question arises whether 



it has been legitimate to refer this plant to the Chlorophyceæ. It 



is in reality very imperfectly known in regard to the cell-contents 



