Miscellaneous. 313 
ple at their first appearance, each very soon develope two equal lobes ; 
and that, from this moment until when the two seminal leaves have 
attained their complete development, it becomes more and more 
evident that each of them is only divided in the direction of the 
medial line. 
A complete analogy of development and organization induced me 
then to study the embryo of Schizopetalon Walkeri, Sims., to which 
Mr. Robert Brown, in the ‘ Botanical Register,’ tab. 752, and recently 
M. Barnéoud, have assigned four distinct and separate cotyledons, 
contrary to the opinion expressed by Mr. W. Hooker in the ‘ Exotic 
Flora,’ tab. 74. I show that the embryo of this plant passes through 
a series of analogous states to those which I have mentioned in Am- 
sinkia; that its germination resembles that of the latter plant, al- 
though the division of each of its two seminal leaves into two lobes 
is still deeper ; lastly, I adduce in support of these facts those which 
the anatomical structure furnishes, and I show that in the germina- 
tions of Schizopetalon we find two fibro-vascular bundles which cor- 
respond to the undivided portion of the two cotyledons, and which, 
higher up, separate into two branches, each destined for one of the 
two cotyledonary lobes. This singular genus of Cruciferz should 
consequently be removed from the list of polycotyledonous plants. 
After having taken a glance at the species of Canarium and Aga- 
thophyllum, the embryo of which appears to have but two cotyledons, 
each divided into three or more lobes, I come to those Coniferze that 
have been considered to possess several cotyledons, and in which it 
is generally agreed the type of the polycotyledonous embryos is 
found. ‘This opinion was admitted in science on the authority of 
Gertner, Salisbury, L. C. Richard, and M. A. Richard. It is en- 
tirely opposed to that expressed by Adanson and Jussieu, who state 
that these Coniferz have but two cotyledons deeply divided into a con- 
siderable number of long narrow lobes. Although this latter view 
has been abandoned by modern botanists, I have attempted to prove 
that it alone is based on facts. After having discussed the objections 
which have been raised against it by Gertner and M. A. Richard, I 
deduce from a careful examination of the embryo in seventeen dif- 
ferent species, and of that of the germination in some of them, the 
following results. 
The pretended multiple cotyledons of the Firs, and of the genera 
in which the embryo is organized on the same plan, are not verti- 
cillate, that is to say, arranged regularly in a circle around a point. 
On the contrary, they always occur divided into two opposite groups, 
absolutely placed like two ordinary cotyledons. In each of these 
two groups, the appendages which have been regarded as distinct 
and separate cotyledons, and which I regard only as lobes, are ge- 
nerally pressed one against the other, whilst a very marked space 
exists between the two groups, sometimes large enough to occupy, 
towards the centre, about a third of the total diameter of the embryo. 
Often, and particularly in the case where the lobes are numerous, 
the embryo is compressed in the direction of the breadth of the two 
cotyledons. Viewing the embryo from the top, the pretended mul- 
