— 280 — 
Kiitz. (Solms-Laubach,l.c. p. 25) arather dubious species as Solms 
has already alluded to. M. Howe on the faith of some original 
specimens in Kützing’s Herbarium has referred this species to 4. 
crenuiata, being most probably founded on few and badly deve- 
loped specimens. On the other hand A. caraibica Kutz. also greatly 
resembles A. Caliculus and related forms, a fact Solms points out 
. when writing: “On the other hand, it may resemble the following 
form (A. Suhrii) very much if the apiculum disappears; indeed Agardh 
has united them, as appears from his diagnosis; however, they are 
to be distinguished by the number and positions of the coronal 
segments”. As to the last remark of Solms, referring to M. Howe’s 
paper l.c., I may point out that in a specimen from the Museum 
of Berlin and without locality, determined by Solms as A. carai- 
bica, three and four hair-scars were found whereas this species 
according to Solms is said to have only two hair-scars. 
Another closely related species, if it is specifically different from 
A, Caliculus, is A. Suhrii of which I have had authentic material 
from the Botanical Museum in Berlin for comparison. 
The reason why this species especially is said to be different 
from A. Caliculus is, according to Solms, that the segments of the 
corona superior have about four hair-insertions and that the rays 
in the disc are united by calcification of the side-walls, but com- 
pletely separate after treatment with acid, whereas A. Caliculus 
according to Solms has the segments of the corona superior with 
two hair-insertions and the rays even in the living state separate 
and free. As to the last point I have already shown that this 
character is scarcely of much importance. And as to the hair- 
insertions I would also remark that there can scarcely be much 
difference; in two original specimens from the Botanical Museum 
in Berlin which I have examined I as a rule found 3 hair-scars in 
the segments which I saw most distinctly, in one I only saw two; 
several of the segments were somewhat shrivelled and some of 
them may have had 4 scars. Even then the difference is not so 
great, as A. Caliculus, according to Solms, sometimes has three 
scars which were also sometimes found in my specimens. In the 
number of the rays also, Solms says that there is some difference, 
as in the A. Suhrii we have 25—30 as compared with A. Caliculus 
which only has 22—25. To this I may remark that in my material 
of the last named species I have found specimens with up to 31 
rays, most frequently they had about 27. The specimen | have 
