406 Extracts from the Minute- Book of the Linnean Society. 
composed of petrified animal remains, which agree in 
structure much better with the Alcyoniums than with 
any thing else I can recollect. The rock exposes some 
hundreds of yards of strata and surface; and, being 
chiefly composed of heaps on heaps of these substances, 
is truly curious. It is cemented together by brown and 
reddish oxide of iron, which often covers the animal 
remains in a peculiar manner with a fine crust of spiculz, 
giving a velvety lustre to them when the light catches on 
their shining sides. Besides these Zoophytes there are 
remarkable Belemnites, mostly worn; and a stratum 
about an inch thick, that presents little else than spines 
of Echini. There are also some Nautili, and small peb- 
bles of every description, to be found in this rock." 
Mar.6, Read the following Observations on some Plants of the 
1811. Flora Japonica, by A. B. Lambert, Esq. V.P.L.S. 
Mr. Lambert having lately received a collection of spe- 
cimens of plants from Japan, and another from Egypt, he 
has been enabled to determine two species of plants belong- 
ing to the genus Mimosa of Linn. which have hitherto re- 
mained doubtful among botanists. One is the Mimosa Leb- 
beck of Linn. found by Hasselquist, who describes it in the 
Act. Ups. 1750. p. 9. It. 473. “ foliis pinnatis” instead of 
foliis bipinnatis; which has caused the mistakes of subse- 
"quent writers on that genus. Jacquin was the first who 
made this plant a new species under the name of Mimosa 
speciosa. ‘his name has been taken up in the first edition 
of the Hortus Kewensis, and Willdenow in his Species 
Plant. has called it Acacia speciosa; but from Mr. Lam- 
bert’s specimens it is evident that Acacia speciosa and 
Acacia Lebbeck Willd. are the same plant. The other is 
uv : the 
