112 



Dansk Botanisk Arkiv Bd. 3. Nr. 1. 



Fig. 122. Galax- 

 aura occidenta- 

 lis nov. spec. 

 Papillæ growing- 

 out into hya- 

 line hairs. 

 (About 370 : 1). 



internodes and 



papillæ (Figs. 119 a, 120) protrude freely over the surface of the 

 thallus and are not included in the chalk incrustation. In shape 

 they are clavate-cyhndrical, having their largest 

 diameter a little above their middle and then 

 abruptly narrowed in, running out into a short 

 apiculus. They are about 40 /u long and 11 ,« 

 broad in their broadest part. They are provided 

 with a well developed chromatophore (Fig. 120), 

 parietal, cuphke, with thin prolongations along 

 the wall of the cell ; in the middle a pyre- 

 noid is present. Occasionally I have found 

 1 — 2 small cells at the summit of the papillæ 

 which is then rounded and very rarely the up- 

 per cell was also growing out to a long one- 

 celled hair richly filled with protoplasm at the 

 upper end (Fig. 122). 



Antheridial conceptacles (Fig. 123) were pre- 

 sent in great numbers. They occur in the young 

 are nearly spherical bodies wilh an opening 

 through the wall of the thallus. Their wall consists of ramified 

 filaments with larger cells growing closely together. From the 

 innerside of these the richly 

 ramified antheridia pro- 

 ducing filaments grow up 

 in the cavity. The anthe- 

 ridial filaments are divided 

 into small cells of which 

 those at the apex (but 

 later on also the other 

 cells) are transformed into 

 mother-cells for the sper- 

 matia. The antheridia are 

 about 8 fj. long and 5 fj. 

 broad, oval. The anthe- 

 ridial conceptacles have 

 mostly a diameter of about 

 200—300 fjt but larger ones 

 also occur. 



To the Sectio Vepre- 

 ciilæ Kjellman only refers four species none of which are from 

 the West Indies. Of these G. vepreciila Kjellm. seems to come 

 very near to my plant. I have been able te compare my plant 



Fig. 123. Galaxaura occidentalis nov. spec. 

 Transverse section of anantheridial con- 

 ceptacles. (About 200 : 1). 



