192 



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



Corallina pumila (Lamx.) Kütz., Tab. Phycol., p. 39, tab. 83, fig. 1. 

 Hauck, f., Meeresalgen von Puerto-Rico in Engler, Bot. Jahrb., 9. Bd., 

 1888, p. 465. Heydrich, F., Beiträge zur Kenntnis der Algenflora von 

 Ost-Asien (Hedwigia 1894, p. 301). 



This little plant grows epiphytically upon larger algae, e. g. 

 Turbinaria and Zonaria. It is fastened to the host-plant by means 

 of a small roundish disc. In the specimens examined by me the disc 

 was about 400// in diameter. From the surface of this disc the 



erect filaments arise; 

 at their base, where 

 they are attached to 

 the disc, a node is 

 always present. 



As the specimens 

 showed some differ- 

 ences according to 

 their growing upon 

 Turbinaria ov Zonaria 

 I wish to describe 

 them separately and 

 begin with those upon 

 Turbinaria (Fig. 181). 

 This was growing in 

 a very exposed place 

 at Judith Fancy on 

 the north side of St. 

 Croix and on account 

 of this the specimens 

 of Jania had also a 



Fig. 181. Jania pumila Lamx. Habit of a plant rather robust appea- 

 with cystocarpial and antheridial conceptacles ^^ 



growing upon Turbinaria. (About 25:1). rance. 



The erect filaments 

 are of very variable size and development. Some of them consist 

 of a single joint which on its top bears a conceptacle, others are 

 longer, a few times dichotomously divided, ending in conceptacles, 

 if they are not throughout vegetative. 



In the basal part of the filaments the vegetative joints are 

 mostly oblong-cuneate with broadly rounded top and very atten- 

 uated base, in the upper part nearly cyUndrical, tapering some- 

 what to both ends. The first mentioned joints are about 200// 

 long, about 150 /i broad at their upper end and 70 /^ at their 

 base, but much larger ones occur; the more cylindrical joints in 



