RHIPIDOSIPHON AND CALLIPSYGMA 365 
seen, since the same strict rule holds good in the Agardh herbarium 
as in the British Museum, that no part of the collection may be 
i iti i fortunatel 
would be reprehensible. As no figure of Callipsygma has ever been 
published hitherto, wy? difficulty of botanists and collectors in re- 
cognizing it is all the greater. We therefore publish some figures 
of it here, together wi ith a few remarks on its structure, in the hope 
that collectors may search for it successfully, and send some of 
their material to us to be examined and included in our forthcoming 
Monograph of the Codiacea, if the genus should really prove to 
belong ny that order. 
he description by J. G. Agardh (i.c.) is as follows:—‘‘ Frons 
nese cine inferne adparenter hirtum et vix incrustatum, 
ancipite marginibus subpi ramosum, utrinque 
xpansa j tot complanata, ramis singulis abeuntibus in flabellum 
terminale, demum sue rachidi prolongatione m Retr ; 
agi 
flabelli cujusque filis inferioribus subseparatis in ramos novos pro 
perantibus. Fila totam frondem componentin atinsitatiti prise ont 
articulis neeran laminarum a margine rachidis exeuntia, repetite 
dichotoma, juxtaposita, lateraliter ierpetoetyret ry stipitis paulisper 
axtions; f invicem superposita et conglutinata secus mediam lineam 
densiora.’ 
do not find that the filaments of the flabellate laminw are 
laterally juxtaposed in one plane as the above description seems to 
ey often overlap, and are poy superposed 
Agardh places Callipsyyma in the Codiacee, and in the remarks 
which follow his diagnosis he compares it briefly with an ben IES 
Rhipocephalus having all its parts flattened into the e plan 
but, whereas the typical structure of Rhipocephalus ctilits of an 
undivided, terete, calcified stalk bearing a head or cone of many 
little cuneate calcified flabella emerging on all sides, Ca/lipsygma is 
constructed on a different plan. The stipe is two-edged, uncalecified, 
and throws out at the margins complanate rachides, which grow 
out each into a te ig es flabellum. The whole plant is, however, 
complanate, and, so as we have seen, entirely uncalcified; and 
the green flabella are a totaly unlike the regular, monostromatic, 
pysaeraghh flabella of Rhipocephalus Phenix (the only species which 
Agardh k pee We would further point out that they bear a ns: 
superficial resem to branchlets of Harvey’s specimen of 
Cladophora valence (Exsice. Alg. Austral. No. 587a), but por to 
XXvili. in Phycolog pent ig' vol. ii. (1859). 
mds e gather from Agari’ s account that the two- onan rachis is 
