194 



Dansk Botanisk Arkiv, Bd. 3. Nr. 1. 



is from a more sheltered place. Compared with the above des- 

 cribed specimens these are comparatively slender with longer 

 branches. The erect filaments are several times dichotomously 

 branched. The antheridial conceptacles occur in the ends of 

 these long branches as against the often sessile ones in the form 

 described above. The tetrasporic conceptacles (Fig. 183) have 

 longer horns consisting of 4 joints ; female conceptacles I have 

 not seen. 



As to the anatomy, the cells in the central strand are of 

 about the same length as those in the nodes. 



X 



Fig. 183. Jania pumila Lamx. Specimen found upon Zonaria. 



(About 20 : 1). 



In referring this plant to Jania pumila I may point out that 

 I have not been able to make any comparisons with original 

 material ; to arrive at an exact determination this seems necessary, 

 the more so, as the original description is very poor and the 

 accompanying figure of no value at all. The form Kützing has 

 illustrated differs considerably from my plant. In naming my 

 plant /. pumila I rely upon Hauck's description ; this is based upon 

 specimens from Puerto-Rico and seems to agree well with my 

 plant. Hauck does not mention how far he has compared his 

 plant with original material. The plant from Jamaica distributed 

 in "Phycotheca Bor.-Am.", no. 799 seems to come very near to 

 mine. 



This plant has only been collected a few times, but is most 

 probably a common epiphyte upon larger brown algæ. 



