3806 QUARTERLY CHRONICLE OF MICROSCOPICAL SCIENCE, 
videmur sepenumero microzooporas, quarum altera alteram 
fugientem persequitur. Haec est microzoospora foeminea, 
que illam, seu microzoosporam masculinam, effugere tendit, 
que contentio, quaamquam nonnunquam prospera, est tamen 
plerumque inanis. Tunc microzoospora masculina rostrum 
suum rostro microzoospore feminee infigit, quo facto utraque 
rostris coheret. Corpus huc et illuc jactans, microzoospora 
foeminea se liberare conatur, spe autem fracta, utraque 
cursum celerrime iterat. Hoc in cursu lateribus earum 
adpositis, ab rostris versus extremitates earum sensim adglu- 
tinantur, ut denique copulatione absoluta, adsit zoospora, 
e duabus microzoosporis sexualibus composita, quattuor ciliis 
ornata et utrinque lateraliter granulo fusco-rubro insignita 
quam zygozoosporam nominare licet ”’ (p. 3). 
In this plant the macrozoospores and the microzoospores 
are produced by different filaments, those producing the 
latter being narrower. ‘The formation of macrozoospores 
also takes place during the summer, while that of the micro- 
zoospores occurs during spring. 
ConFERVACE®. — Areschoug has detected conjugation 
(fig. 4) in Cladophora sericea. His observations lead to the 
Fig. 4.—Conjugation of Cladophora sericea x 1000 (after Areschoug, 
tab. ii, fig. 12). 
conclusion that the macrozoospores (also first detected by 
him) and the microzoospores are produced by different 
plants. The microzoospores are not all of the same size. 
“‘Microzoospora feminea et masculina nunc ejusdem mag- 
nitudinis, nunc masculina quam feminea minor ” (p. 9). 
Untvacex.—Thuret first described the macrozoospores and 
microzoospores in this group. In Enteromorpha the former 
are furnished with four cilia, the latter with two. The for- 
mation of the zygozoospore in E. compressa has been re- 
peatedly seen by Areschoug and takes place in a manner in 
no respect differing from that already described. 
MyxomyceEtres.—Amongst fungoid types Sachs associates 
these with the groups which have been enumerated above. 
