366 THE JOURNAL OF BOTANY 
constricted at fairly regular intervals, and at these points dichotomy 
usually occurs ; and the dark green chlorophyll becoming massed 
at the constrictions (in the dried plant at least), the flabellum acquires 
a omens zonate appearance. 
ave compared Callipsyyma above with Cladophora, and the 
pret 5 Bie holds good even in so far that Callipsyyma, unless 
all a 
centre through which protoplasmic doctanteet is ii (fig 
Agardh does not allude at all to these structures. Under a ‘high 
power of magnification with a well- adjusted substage condenser, it 
is possible to see clearly the striation of the walls of the ingrowing 
ring, and when the preparation has been stained with chlor-zine- 
iodide (a treatment adopted at the ee aban 6 of Mr. . Black- 
man) the thin strand of protoplasm appears quite distinct. We 
the cellulose ring would still be very narrow, and the aperture large 
and distinct. Similar piete plage 2 are well known in Codium, 
and have been described and figured in a paper by R. J. Harvey 
Gibson and Helen P. Auld Rees ine Biology Committee. 
ees iv. Codium, 1900). 
ars to us, so far as we have been able to study ( iaeeygme 
that the affinities of the genus may as likely be with DBryvpsis as wi 
the Codiacee. For the resemblance to Rhipocephalus as petite om 
by Agardh is misleading, and has caused both De Toni and Wille 
to give Callipsygma a sy stematic pose between Rhipocephalus and 
Udotea to which it is in no way entitle 
he only species, Callipsygma W ilsonis ; J. Ag., was collected at 
Sorrento, Port Phillip Heads, Victoria, by J. Bracebridge Wilson, 
in 1881. 
mig round oF PuatTe 467. 
Udotea javensis. — Fia Plants, natural eel a, Ferguson, Ceylon; 
b, ** Siboga.” 2. ‘* Siboga ” ant, Pag" 3. Bases of two fronds, showing 
ramification and rhizoids, x 29 , ¢. Figures explaining Montagne’s 
** anastomosis,” 0. 
Callips ygma Wilsonis. —Fic. 5. Plant, natural rey a, in Herb. Agardh, 
from rough sk ie ue on . A. Howe ; }, in Herb. Brit. Mus. 6. Filam ent of 
lamina, x . In-growing cellulose rings forming Fedataples i septa, mer 
~~ chlor. ees idides a, showing protoplasm; b, at a dichotomy, showing 
striz of ring. 
