To Mr. Jomicr, one of the most nntmng end
of Cryptogamio botanists, and tvhose mtccllent Flora of
T u n b A c V e l l , is I belieye the only one winch contarn.
any thing like a complete list of the freshwater Alg«, am
likewise greatly indebted for numberless recent specimens
Alg«!, which otherwise I had never seen, as well as for many
oriffinal and accurate remarks.
To Dr. G. J. Allman, my highly valued friend, and the
talented Professor of Botany in the Dublin University i to
S n Johnston, of whose yalnahle i— ns in toophy-
tology I entertain a grateful remembrance, ^
pupil of such a master any man might be proud , to M .
M ita iv n e , Areseboug, Deeaisne, and Mr Shnttleworth,
whose Residence in foreign lands precluded
frequent communioation, and from whom therefore I regret
that I have not been able to obtain more of ^
of which they arc so largely possessed; to Mi. Thwailes.
of Bristol, Mr. Sidehotham, of Manchester, Dr Dickie, of
i b ^ n , Mr. M-Colla, of Ireland, and Mr. Thompson, of
Belfast mv warmest thanks are due.
I m i t not forget also to aeknowWge the '“ »“ y “ “J '
e which I have derived from Mr. Coppm, of Trinity
c X « e . -o r emit to mention the deep cMiga-
tion I am under to a lady for the deyot.on of much time
the shadina: of many of the plates.
To Mr Boss, the eminent optician, with one o w ose i
struments most of the nicer observations were made, my
acknowledgments are likewise due. , • n ur a
To the Subscribers also to this work I feel much indebted
their cjenerons patronage has relieved my mind of considerable
anxiety, for it has removed all pecuniary risk to myself,
if it has not insured a reward of the same natuie.
N orland Villa, Addison R o ad N o rth , N e ttin g H ill.
J u ly , 1845.
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