NOTICES OF BOOKS AND MEMOIRS. 875 
believe, exceedingly fine specimens of A. septentrionale. This 
latter fern was tolerably abundant in one part of the Llanberis Pass 
before the ravages of tourists begun; I fear that cannot be said of 
it now, as the place has long been known to the guides. When I 
pointed out to Hugh Lewis that apparently the specimen given to 
i Mr. Butler was A. septentrionale, he told me that he 
the place where he could show me one of the roots. It is a spot 
wbich I have not visited since that occasion in 1865, owing to its 
difficulty of access. He offered to show-me the other two roots, 
but I declined. That which I saw was a good strong root, with 
fronds and many broken stems of old ones. I took two 
and he alone knew the spot. The fronds were less than two 
inches long, and exactly resemble those of the continental plant, 
and of the British ones from Wastdale, Borrowdale, an 
e very like the 
Newman (‘ Ferns,’ ed. 3, p. 258). As this plant is exceedingly 
ed to make these remarks, although I have 
not seen the specimens distributed by the Exchange Club.—C. C. 
BaBINGTON. 
Errrocum apaytium.—Our readers will learn with interest that 
this Orchid has again been found in England. 
Prof. Babington that ‘It has been gathered two or three times 
dies at Ludlow, in a strictly preserved wood, at about a 
mile and a half to the north of that town, in Herefordshire. I 
Notices of Books and Mlemotrs. 
By Cuartes Darwin, LL.D., F.B.5., 
The M ents of Plants. 
ean 5 Darwin. London: John Murray. 
i i lication of the facts to support th Vis 
ot Daratn: Hav demonstrated that certain peculiar variations 
or periods occur in the growth of small tracts of cells, and that 
