— 276 — 



by Quoi et Gai m ard (I.e.) and this seems to me to be in good 

 accordance with my specimens (Fig. 4). 



The plant reaches a height of 

 about 2 — 3 cms.; the stalk is rather 

 rigid and calcified; on the upper- 

 most halfpart, sometimes even lower, 

 it has spindle-shaped swellings bea- 

 ring on their thickest part a whorl , 

 of hair-scars after deciduous assimi- 

 lation-hairs, in accordance with the 

 figure of Quoi et G ai m ard (I.e.) 

 and as figured by Harvey (I.e.) 

 and mentioned by Solms (1. c.). 

 By means of a ramified, lobed rhiz- 

 ome the stalk is at the base fastened 

 to limestones or shells. As pointed 

 out by De Bary and Strasburger 1 ) 

 as to Acetabularia mediterranean this 

 rhizoidlike base penetrates into the 

 substratum most probably by de- 

 composition of the latter and it is 

 therefore so strongly connected with 

 it that one always 

 only gets the up- 

 permost part of the rhizome when trying to tear 

 the plant free. Only by loosening a small piece of 

 the stone on which the plant is growing and 

 afterwards dissolving the stone by means of acid 

 we get the base of the plant intact. As the 

 figure 5 shows this is an irregularly lobed body; 

 it has a large contraction almost in the middle 

 so it is quite in accordance with the description 

 of De Bary and Strasburger of the base of 



A. mediterranea which has below the contraction ^ 



Fig. 5. Acetabularia 



what they call the "Basalblase" and above it the Caliculus Quoi et 

 "Fuss". In the "Basalblase" and by the way also ^XfpknT ° f 

 in the "Fuss" amylum is found in quantities. "About 20:1. 



Fig. 4. Acetabularia Caliculus 

 Quoi et Gaimard (about 3 : 1). 



*) De Bary, A. and E. Strasburger, Acetabularia mediterranea. Bot. 

 Zeit. 1877. 



