— 276 — 



by Quoi et Gaimard (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 Gaimard (I.e.) 

 and as figured by Harvey (I.e.) 

 and mentioned by Solms (I. 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 mediterranea, 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 , 



Big. 5. Acetabularia 



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

 "Fuss". In the "Basalblase" and by the way also Gaim t j l 1 1 e d pl f n a t " e ot 

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



Fig. 4. Acetabularia Caliculus 

 Quoi et Gaimard (about 3: 1). 



J ) De Bary, A. and E. Strasburger, Acetabularia mediterranea. 

 Zeit. 1877. 



Bot. 



