200 



J. Agardh^) was the first to point out that the mutual 

 arrangement of the hairs and the frutifying organs could be used 

 to distinguish the species. Later on Hauck^') put this into 



Fig. 153. Paclina Sanctse Crucis nov. spec, 

 a, cells from the lower face of the thallus. b, transverse seolion of thallus 

 near the base. <■, transverse section of the margin of the thallus with a 

 young ^roup of hairs, d, vegetative cells from the surface together with 

 sporangia and indusium. e, transverse section of the thallus with sporangia 

 and liairs. (About 90 : 1). 



') J. Agardh, Till Algernes Systematik, 2dra Afdeln., p. 116. (Lunds 



Univ. Arsskrift, T. XVII). 

 -') F. Hauck, Ueber einige von I. M. IIildebrandt im Rothen Meere 



und Indischen Ocean gesammelte Algen ("Hedwigia", vol. 26, 1887, p.41). 



