48 LETTERS FROM DR. HARVEY. 
when commencing the exploration of that place. I afterwards went to 
Rottnest Island, and spent six weeks exploring its reefs, and left them 
not half exhausted. Unfortunately the reefs are only accessible at new 
and full moon, and low-water at this season is after sunset, so that I 
could only have hasty wadings in the evenings, often driven away by 
darkness. Nevertheless I greatly increased my number of species, and 
dried a large box of specimens. Since my return to the Sound, I took 
advantage of wet and stormy days (and a fit of the gout!) to examine 
all my West Australian Alye, naming and describing the new species. 
The result is, that I have collected 352 species (besides Sargassa and 
Cystophore, not examined), and mark 140 species as new. Among 
them are six new genera, all well characterized. There is no very 
wonderful structure among the novelties—no new genus of network. 
I did not myself find Claudea, but it was twice found in small quantity 
by Mr. George Clifton, while I was at Fremantle. He is a disciple 
of mine and an ardent collector, from whom I hope much in future. 
My Martensia Brunonis, which I sent you, I have since reduced to M. 
elegans, the African one. The whole number of network Alge which 
I have found is nine, of which four are new species. Besides these I 
found a beautiful new Kallymenia, as big as two large cabbage-leaves, 
joined at the base, of a rose-red colour, and regularly pierced all over, 
like an Agarum, with round holes. I have only two perfect specimens, 
one of which is intended for you. Mr. Sanford gave me, from Cham- 
: pion Bay, a superb new green-lace Alga (Struvea macrophylla, MS.) sent 
_ by Drummond's daughter-in-law. I fear you do not remember the genus, 
which is described in Pl. Preiss., and of which you have the original 
species; but the new one has a stem supporting an oval crenated net- 
ork, five inches long by three wide, resembling (it is bleached) an 
" ant structure of old point-lace—just what you might see on a Van- 
dyke collar. Ihave only a single specimen. Iam preparing a memoir 
on these Ælgæ, which I shall send home to be read at the Royal Irish 
Academy; and printed in their current Proceedings, with a view to a 
larger and fuller memoir, with plates, in their Transactions, after my 
return home. I shall have some extra copies struck off, and direct one 
be sent to you, which you can notice in the Journal. ‘The number 
duplicates collected in West Australia is about 16,000; not bad work 
sia considering I had no assistance, and frequently had io carry my 
day's collections five or six miles, under am. Australian sun. 
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