358 



Subfam. 3. Kallymenieae. 

 Kallymenia J. Ag. 



1. Kallymenia peiiorata J. Ag. 



J. AGARDH, Bidrag till FJorideernes Systematik, p. 9; Epicrisis, p. 21H. 

 B0RGESEN, F., Some new or little known West Indian Floridese, II, p. 180. 



A few specimens of this plant, first described from Ceylon, 

 were dredged in the sea around St. Jan. As mentioned in my paper 

 quoted above I have been able, through the kindness of Prof. SVE- 



Fig. 353. Kallymenia perforata J. Ag. 



a, transverse section of the thallus. b, a stellate cell. 



(About 150:1). 



DELIUS in Upsala, to compare my plant with an authentic specimen 

 from Ceylon. From this comparison I arrived at the conclusion that 

 both plants, as to their outer habit and anatomical structure, seem 

 to agree perfectly. 



The plant has an Ulva-\ike, flat thallus, perforated by numerous 

 roundish holes, smaller in the young thallus, larger in the older, this 

 receiving thereby a reticular appearance. The holes seem to originate 

 through the tissue in certain places becoming absorbed. At any 

 rate I have several times in younger parts of the thallus found small, 

 roundish, rather well-marked spots in which the tissue was much 

 thinner than in the other part of the thallus, these thinner parts being 

 undoubtedly the beginning of the holes. 



A transverse section of the thallus (cp. Fig. 353 a) shows that 

 this consists on both sides of a rather loose and thin-walled cell- 

 tissue and of a cavity in the middle through which filaments are 

 running in all directions. 



