THE ORIGIN OF THE BRITISH FLORA. 441 
to a whitish grey on the outer edge. Apothecia one-sixteenth of 
an inch in diameter. Spores simple, oe colourless, ‘06 mm 
long, ‘03 mm. broad.—W. H. Wu 
Mipptesex Mosses.—The itor mosses, new for Middlesex, 
have been met with since those recorded in this Journal for 1894, 
pp. 106, 369 ; 1896, p. 400 :—Pottia littoralis Mitt. Frays Meadows, 
Uxbridge.—B» ‘yum murale Wils. Canal-walls near Harefield.— 
Mnium punetatum L. recourses in Mad Bess Wood 
ee slin Woods).— Brachythecium salebrosum B. & 8. var. Mildeanum 
.-— Canal-walls, &¢., between Denham and Moor locks 
eating freely).— Hypnum aduncum Hedw. Ruislip Reservoir, 
rays Meadows, Harefield Moor, Northwood, &c. (omitted in 
former lists).—Dicranum montanum Hedw. .H. corner of Duck 
Wood, abundantly. — Dicranum flagellare Hedw. Grows sparsely 
on rotten So Picts in all the Ruislip and Harefield Woods,— 
oun Ben 
Fora oF Bia. trE.—I am sorry to find that there are two 
errors in this Flora, for which I am responsible. One is Epilobium 
hirsutum x montanum, which I never gathered: EF. hirsutum x 
obscurum was the plant intended, and I must have written the former 
hybrid by a slip. The other mistake is eee cea Selago, also 
probably my slip, for L. clavatum. The latter plant is very rare in 
the station given, and though I tried hard ei establish the record 
there for Selago this summer r I failed, and must ask leave to expunge 
it.—A. H. Wottey-Dop. 
NOTICE OF BOOK. 
The Origin of the British Flora. By Curent Ret, F.R.S., F.L.S., 
F.G.8. 8vo, pp. 192. London: Dulau & Co. Prics 5s. 
Tuts thin volume contains a summary of the results of some 
eats three years’ patient and erm ee of the 
vegetable remains found in the newer tertiary — s of this 
scent, together with the conclusions ae autho edu 
therefrom, as to the changes the flora has undergone Heid climatic 
and other causes. The book is divided into six Sar and an 
appendix. 
PEthe f first a ets is a the second is occupied with 
remarks as to the ng flora, with especial reference to the 
groups into which its ere may be divided, from the standpoints 
of climate, habitat, and geographical distribution. In this there is 
little, if anything, that is new. ter three, which relates to the 
means of dispersal of the plants of this country, will probably be 
found the most generally Se engl The principal means of 
dispersal are summarized as follow 
