89 
SOME ALGOLOGICAL LITERATURE OF 1899. 
In Flora (Band 86, Heft 1, Jan. 28, 1899) is depts the final 
contribution, ‘‘ Ueber die Sexualitiit der Ectocarpeen n Friedrich 
Oltmanns, to the discussion which took place in the: ie journal in 
1897 — Prof. seats and a Berthold, concerning copulation 
M. Sauvag ook 
species. Prof. Oltmanns had suspected that pe these observers 
a been deceived by a spurious coalescence of swarm-spores with 
a species of Filagellate, which he had himself aA hriat while all 
his efforts to produce true copulation had failed. In t the present 
paper Prof. Olin withdraws entirely from his sceptical position,. 
and declares that M. Berthold’s results wate perfectly right. He 
describes his own investigations in the spring of 1898 in Naples, 
and confirms M. Berthold’s ne te obaberelionds in every etn 1 
As a resu ult of this confirmation, the author proceeds to uce 
giving therefore no less than four different kinds of sporangia for 
. . ig 
F, Padina has been shown by M. Sauvageau (“Sur la sexualité 
des Phéosporées,” Journ. de Be linia 1896-7) to possess the same 
pistes of pe aeeaie: organs, an he has described bs an a ig 
r0 
diveatly, In the course of Aatclonmnsit these iat cane 
became differentiated, on the o 
which copulation was & necessity for farther development; on the 
s, which. were incapable of copu- 
just recognizable, but it is strongly mar 
}, Lebelit ading. Hence the asexual swarm-spores 
are also sharply differentiated in this group a 
Prof. Oltmanns infers that the asexual swarm- 
urther mode of reproduction in Hctocarpacee 
is the espera of aplanospores, W 
with Tilopterid. f th 
Prof. Clbieais closes his interesting paper with a list “4 “a 
forms of reproduction that might exist egypt in one and the 
same species of Hctocarpus or Tilopteris. ee 
