50 Mr. W.S.Macreay on certain general Laws regulating 
 'The next work in which the distinction appeared was the 
Mémoires du Muséum d Histoire Naturelle; in a part of which, 
published in the autumn of 1821, a paper was inserted by 
M. Decandolle on the natural family of Crucifere. Here this 
botanist states, that he finds it possible to express in a table all 
the affinities existing in this family of plants by what he terms a 
double entrée ; in other words, he supposes that there are trans- 
versal affinities as well as direct ones,—a notion of the reality 
however which appears to be much more confused than that 
previously entertained by M. Agardh and explained as above in 
his Botanical Aphorisms. 
In the same year (1821) likewise appeared the abovèmen- 
tioned work of M. Fries on Fungi, which is explicit on the sub- 
ject, and wherein the very same expressions of affinity and ana- 
logy are used to designate these different relations, which I had 
applied to them two years before in treating of Lamellicorn 
Insects*. The 
cipationes forme perfectioris in plantis inferioribus non raro obveniant; ut etiam in 
plantis superioribus regressus ad formam imperfectiorem.” Now in the Hore Ento- 
mologicæ, p. 223, I have attempted to show that Nature, in the imperfectly constructed 
Acrita, sketches out in a manner the five principal forms of the animal kingdom. So 
also the direct return of Annulose Vermes to Acrita is repeatedly asserted in the same 
work: this however seems to depend more properly on M. Agardh's other observation, 
viz, 4 Duplex est itaque affinitas plantarum, aut ea, que oritur e transitu ab una forma 
normali ad alteram, aut ea, quæ versatur imprimis in anticipatione formæ superioris aut 
regressu in formam inferiorem. [Ham affinitatem transitus appellamus, hanc transulta- 
ionis." This affinity of transultation is evidently nothing else than the disposition ob- 
servable in opposite points of the same series or £ransitus of affinity to meet each other, 
and of which I have given various examples in the Hore Entomologice, p. 319. 
* [ owe my acquaintance with these several works, as well as much information on 
points of which I should otherwise have been totally ignorant, to the friendship of the 
consummate botanist, in whose possession the Banksian Library has been so worthily 
deposited. The second part of the Hore Entomologice was published in April 1821. 
On the 24th of the following month I first saw a copy of M. Decandolle's paper, 
which was not published till some weeks after; and in the course of last winter I 
first 
