48 BOTANICAL GAZETTE. [Feb. 
W. T. THISELTON DYER, who has acted for some years 
esignation of Sir J h D. Hooker. Dr. Dy e is familiar to botanical students in 
thi f the translators of Sachs’ Text- a th h 
ition of assistant, which has become of almost as great importance as that of director, 
t, wh 
has been offered steal accepted by Mr. D. Morris, F. G. S., heretofore Director of Public 
cage Jamai 
s to be a subject of aatiage nit ny 
by Thomas Hick. In the Journal re Botany for December he gives his results with Him: 
thalia lorea and Laminaria digita t the same time apologizing for including the Satie 
with Fucacez. The most effective capi for sw ven anche « nd even dis ing were 
necessary. In both these cases continuity of protoplasm was clearly ace ia it the cor- 
tical and central tissues, bi not at all for the epidermal. In Himanthalia continuity is 
maintained by means of comparatively stout cords of protoplasm and also by sieve-plates, 
while in Laminaria it is ietiy through the intervention of sieve-plates. 
THE EXISTENCE of Salvinia natans in this country has a ways been doubted. The only 
evidence that it grows in the United States is we. ant ement of -Pursh. that ses saw it in 
Western New York, but his collections which 
cimens of it. Recently, however, Mr. C. H. D tri d to Dr. Asa sy spec 
mens of Sonbine Salvinia —— collected ina bay ou of Bois Brule rok in Perr es 
Whether or s to be aust. 
It is hard . believe them native, as the plant could hardly be ‘confined to so limite ted a 
locality and is conspicuous enough not to be easily overlooked v ; an 
is equally sink t to understand how they could possibly be introduced. 
THE GEOGRAPHICO-BOTANICAL EXPosITION held in Copenhagen last April under the 
supervision of M. Carl - nsen met with excellent success, according to a lithographed ac 
count just received. was held in the halls of the Royal Danish Society of Daneriiiey 
and aimed to give an pie of the vegetation of different — s of the earth by grouping 
2: : 
5 
y me c 
sigs eenc ayn = Sopa 8 we ere giv n, both a mateur and sesamiae aa panna a all 
a good attendance. This is one of 
the f fst exhibitions of the kind yet attempted, and its success ought to innate iunilar 
RED sNOw was the dabloct ofa paper by Romyn Hitchcock, before the Biological Soci- 
ety of Washington, which is printed in the December number of the Amer. Micro. Journal. 
e obse 
lla, Pro 
cus, Lepraria and Chlam us, and its true position seems yet in doubt. Its papal 
and onsen has not yet been traced. 
