— 276 — 
by Quoi et Gaimard (l.c.) and this seems to me to be in good 
accordance with my speciniens (Fig. 4). 
The plant reaches a height of 
about 2--3 ems.; 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 (l.c.) 
and as figured by Harvey (l.c.) 
and mentioned by Solms (I. ce.). 
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!) 
as to Acetabularia mediterranea, this 
rhizoidlike base penetrates into the 
substratum most probably by de- 
composition of the latter and it is 
Fig. 4. Acetabularia Caliculus therefore so strongly connected with 
Quoi et Gaimard (about 3:1). jt 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 of 
in the “Fuss” amylum is found in quantities. About 20:1. 
!) De Bary, A. and E. Strasburger, Acetabularia mediterranea. Bot. 
Zeit. 1877. 
