95 
Cutler ia multifida ( Grev . ). 
And added to these, that : — 
4. Janczewski, at Antibes in 1883, germinated a true foot- 
embryo from fertilized oospores of C. adspersa , and 
this in subsequent development became a dorsiventral 
structure, closely comparable with many of the Plymouth 
embryos (Fig. 16). (A special point of interest attaches 
to Janczewski’s cultures, since in them the arrest of 
terminal growth which forms the special characteristic 
of the foot-embryo is not complete ; the young foot-stages 
being figured as bearing a terminal filament with an 
intercalary zone of growth.) 
5. Reinke, at Naples in 1876, obtained protonematoid em- 
bryos, identical with Thuret’s Cutleria-z mbryo, from both 
zoospores and fertilized oospores of Zanardinia collaris. 
(These stages, which were the most advanced obtained 
by Reinke for members of the Cutleriaceae, were also 
distinguished by presenting no trace of the tissue-fusion 
necessary to form the true adult thallus. They further 
differ from the Plymouth cultures very considerably 
in their rate of growth ; a definite protonematoid 
embryo being only obtained by Reinke in three months, 
while one month at Plymouth gave the furthest vege- 
tative stage observed. Nor was any trace whatever 
noticed of the peculiar phenomenon, suggested to be 
pathological, which Reinke describes and figures under 
the name of ‘secondary spores,’ in the germination 
of Zanardinia , Cutleria , and Aglaozonia). 
6. Reinke also found the protonematoid embryo of Zanar- 
dinia growing in its natural habitat, and, as already indi- 
cated, the protonematoid embryo of C. mtdtifida has 
been described as reproducing naturally at Heligoland 
(Kuckuck). 
