On the Amylaceous Globules of the Floridex and Corallinez. 117 
On opening a number of specimens, it was found that all 
those with a large anal fin were males, while those in which that 
organ was small were females. The females are, however, to be 
distinguished from the males by another character, namely the 
much larger size of the urogenital pore, which is situated imme- 
diately behind the anus. 
XXIIL—On the Amylaceous Globules of the Florideze and Coral- 
linee. By M. van TirGuEm*, 
Kiurzine first indicated} the existence in the cells of certain 
Floridee of amyloid grains, sometimes endowed with a con- 
centric structure; but in assimilating them to the _proto- 
plasmic globules of the green and olive Algz, in including 
under the general name of cellular globules or gonidia the whole 
of the intracellular formations of the Algz, however dissimilar 
they may be, and in ascribing to them, as is implied. by this 
name, a reproductive faculty, the illustrious algologist seems to 
me to have misunderstood their nature and function. M. Nageli, 
also, in his great work on starch-grains{, hesitates to pronounce 
an opinion as to the existence of starch in the Floridee. His 
own observations, indeed, showed him, in Cystoclonium purpu- 
rascens, Kiitz., some globules to which iodine communicates a 
coloration varying from ‘red to brown and violet; but he took 
them for slightly amylaceous parietal grains of protoplasm, and 
he remained so uncertain upon this point as to declare, in 
another part of his memoir (p. 382), that starch-grains are 
wanting in the Floridez, and finally to leave to fears investi- 
gations the care of deciding whether these Alge do possess 
starch, and of what kind it is. It is this point that I have 
undertaken to clear up by a series of observations, of which I 
have the honour to present the Academy with the first results. 
For the sake of clearness I shall take as an example Halo- 
pithys pinastroides, Kutz., which is found in abundance on our 
coasts. In the cylindrical and much branched frond of this 
Floridean, the thickened joints of the axis contain only a finely 
granular liquid ; the joints of the five siphons, on the contrary, 
and the cortical cells are filled with transparent globules, which 
are colourless in the interior tissue and of a rosy tint in the 
peripheral zone, although readily deprived of their colour by 
alcohol; these are scattered in the liquid which bathes the 
sections, forming therein white streaks. Their most general 
* Translated from the Comptes Rendus, Noy. 6, 1865, pp. 804-807. 
+ Phycologia generalis, p. 40. 
f Pflanzenphysiolozische Untersuchungen : Die Stiirke-Korner, 1858. 
* 
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