18 EXTRACTS AND ABSTRACTS. 
the assumption of the spherical form, the margin of the masses changes 
its contour, and moves at first slowly but afterwards more quic ickly in 
e interior of the cell. While this is going on the top of the cell is 
transformed into <i which finally dienes, so that we have 
now a sort of purse (sporange) filled with eight mobile Riesctintic 
become more and more prominent owing to the rest of the plasma 
gee i into them, until the adult pedicellate spherical cell is arrived 
HR oes te: during the prevalence of cold weather, the plas- 
e bodies are nucleated; but all the stages of devel pment of 
nucleus ; this se A remains at rest throughout the winter and germi- 
nates in ‘the e spring 
_ The author compares Ri genus with Guttulina fe goohanky, 
from which it differs onl the presence of a cell-m 
ceboid ce Peace 
view of Sachs, who sees in the bl ang 
of the spores a true sexual act, are regarded with favour. Bursullais 
found on horse-dung. 
DevetopMentT or APHANOMYCES. Saez? 
éveloppement de ? Aphanomyces stellatus. Par M. Nicotas Soro- 
pice ( Annales des Sciences sacra gel 1876, p. 46.)—<Aphano- 
ym 
transverse partition from the rest of the oan an wi a time if 
bursts at the extremity, the spores escaping one b 
themselves at the mouth of the opening. 
each | i 
ris them, the ereeny spore-membranes remaining massed together at 
tions come to rest in loco. Sometimes, when 
almost all the mobile spores ne escaped to the opening a ete _ of 
