184 THE JOURNAL OF BOTANY 
the Glacial pared) that the existing flora, apart from a few Arctic 
Alpi ards 
and Alpine species, came in towards the end of, and after, that 
period ; Ea that especially ee ‘ eegn or a. ae 
referred to as seg an ; and ‘American’ : ‘lim i 
p t has been slinied out that birds usually migrate 
fasting ; and although ducks, &c., doubtless ag ted some seeds by 
mud adhering to their feet, this is unlikely to happen in cases of 
sweeping generalisation can account for all the facts. 
O hern plants are dealt with under three heads:— 
1. Species (13) a on and near cultivated land; these include 
little or no claim to this rank. 2. Solon (48). qoute to the 
coasts (littoral g vese Tone anglica is most likely intro- 
duc rm Species (95) neither littoral nor 
confined to the aiatomers ee cultivated land. Of these 
onopodium, Cardwus pycnocephalus (i.e. crispus, — ) 
Erica cinerea, E. Tetralsa, Scilla non- -scripta, & and S. can 
oe be called southern plants. Notable omissions are Trifolium 
trictum, Leucojum estivum (truly wild!), and L. vernum; the 
pra of the last-named is, however, open to question. 
e second and third groups have ten columns annexed, 
giving their sgh ca limit on the oo West, so and 
East limit, in Great Britain, and W d East in Ireland; 
character of habitat : ee-etaatios or (Irish) pe ne: and type, 
aonenting to ~— tson. 
seful Summary concludes this excellent paper. It deserves 
ee thorough analysis than is possible within the compass of a 
short notice. 
Epwarp 8. MarsHALt. 
Fundamentals Plant are A By Joun on — Ph.D. 
D. Appleton & Co. 1914. 6s. n 
THE critic hors sets out to review this ee finds himself 
confronted with a very difficult task. He cannot fail to be 
ultu i 
work—despite its easy style and considerable body of informa- 
tion—is by no means free from the imperfections which c 
terise so many of the books which seek to popularise the science of 
genetics. 
These defects, common to this class of book, appear to be o 
— kinds, and are traceable to the fact that the books are written 
by botanists who have been moved by the rapid current of genetical 
discovery to write upon the subject. Of these defects the first lies 
in the failure to recognise or propound precisely wherein the 
