- 1900) 
CHANGE OF FORM IN GREEN ALGH 317 
was exactly that shown in fig. 78), put into K, 1928 V X 10 May 8, Igoo. 
Exposure June 15. Very few and very short filaments at the edges of large 
Fig. 23. Culture no. 109. Filaments from no. 83a, put into A, 1928 V X 
io May 8, 1900. Exposure June 15. Very few filaments at the edges of 
large palmella colonies. 
‘Fig, 24. Culture no. to5a. Filaments from no. 83a, put into C, 2892 V 
X04 May 8, 1900. Exposure May 28. Palmella with scarcely any ten- 
_ tency to form filaments at edges. 
‘Fig. 25. Culture no. 1184. Filaments from no. 83a, put into D, 964 V x 
: 10 May 8, 1900. Exposure June 15, Filaments were produced from z00- 
_ Spores and have grown long. Their older cells have rounded and the very 
dldest ones are truly palmella. 
Fig. 26. Culture no. 176a,. Filaments from no. 1482 (fig. 78) put into 
K, 2892 V X 10-4 May 25, 1900. Exposure June 15. Nothing but palmella. 
Fig. 27. Culture no. 1114. Filaments from no. 83a, put into C, 1928 VX 
le May 8, 1900. Exposure June 15. Nothing but palmella. : 
Fig. 28. Culture no. 116a. Filaments from no. 83a, put into B, 964 WV x 
_lo'May 8, 1900. Exposure June 15. Very few filaments at periphery of 
egular masses of palmella. 
Fig. 29. Culture no. 169a. Filaments from No. 1484, put into C, 964 NX 
_ $*May 25, 1900. Exposure June 15. A mixed culture, showing palmella, 
young and old filaments, the latter changing to palmella, and zoospores. 1 
‘Spoor, True palmella is shown at the upper right. 
os 'G. 30. Culture no. 1062. Filaments from no. 83a, put into D, 2892 NV X 
May 8, 1900. Exposure May 28. Original filaments are traced by 
d strands of palmella. At the tip of each strand are two OF three 
flament cells, 
: oe 31, Culture no. 123a. Filaments from no. 83a, put into C, 96.V X 
Pe * 1900. Exposure June 15. Many new filaments were produced 
; dg The original material has, in good part, gone to senor 
_ soncentrati laments conti 
- Ramenis on tion from evaporation. The younger fi AS 
put into K, 96 VX 
ts my 900. Exposure May 28. Original material growing as fila- 
“ue palmella, Also many young filaments and zoospores. 
€ no. 122@. Filaments from no. 834, put into B, 96 NX 
finely 
ents, Young filaments and zoospores. a N 
34. Culture no. 158¢. Filaments from No. 148a, put into H, 964 4V 
25 . Exposure Juners. There are scarcely any good fila- : 
almella cells lie in loose rows, marking the @¥92" 7) = 
ts, 
’ Igo 
teas The p 
~ "ginal filamen 
