( i 



they call the »Basalblase« and above it the »Fuss«. In the »Basal- 

 blase« and by the way also in the »Fuss« amylum is found in 

 quantities. 



On the uppermost part of the stalk there is a basin-shaped 

 disc in consequence of the upwards curved rays ; it has about 

 26 — 28 rays which are united in the living plant but immediately 

 separate after decalcification with acid. According to Solms the 

 plant ought to have : »Rays even in the living state separate and 

 free«. This however 

 was not the case 

 with my specimens 

 and this is the most 

 essential difference 

 between my speci- 

 mens and the de- 

 scription of Solms. 

 Yet I do not think 

 this is so very im- 

 portant. One of the 

 above-named spe- 

 cimens from Fre- 

 mantle in the Brit- 

 ish Museum and 

 conserved in spirit, 

 really had a few 

 separate rays but 

 most of them were 



connected and when seen under the microscope a calcified mass 

 was also visible on the few separate rays with which they most 

 probably have all been pasted together. In the original figure 

 also by Quoi and Gaimard they are connected and Harvey 

 writes 1. c. tab. 249 : »The coherence between the cells also 

 appears to be less strong than in other species«, but that they 

 might be free he does not say. In this connection I may also 

 point out that Howe in Acetabularia Farlowii, which according 

 to Solms has separate rays, by examination of the plant in the 

 living state has found that »only about one in four or one in 

 five« of a thousand specimens has these free. 



The apices of the rays have broadly rounded corners and in 

 the middle often a large broad deepening (Fig. 63 A). This is 

 especially developed in the older disc but is also often to be found 

 even in quite young. However it may be pointed out that spe- 



Fig. 63. Acetabularia Caliculus Quoi et Gaimard. 



A, Part of the rays with gametangia. B, Corona 



superior with hair-scars. C, Corona inferior. 



A about 10:1, B and C about 60:1. 



