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NEW PUBLICATIONS. 287 
similar manner.” But of the nine (not eight) species which the dis- 
trict possesses of M. Thurmann’s fifty typical “ xérophiles,” only 
three appear in the list of forty-four xerophilous plants already men- 
tioned, the remaining six being by no means so restricted (e. g. Eu- 
phorbia amygdaloides, Mercurialis perennis). 
he chapters on the climate and the physical geography will be read 
with great interest. Northumberland and Durham together correspond 
to Watson’s Tyne province, and contain three of his vice-counties. 
The province is divided by Mr. Baker into eleven districts, founded on 
the drainage. It is to be regretted that the distribution of all the spe- 
cies throughout these districts has not been attempted to be shown, 
but material probably does not exist at present for rendering such a 
table possible. The boreal species (108 in number) are, however, so 
treated; and it is singular to remark that the district containing 
by far the largest number (74) of these is the most southern one. 
Mr. Baker “ cannot undertake to explain ” the reason of the richness 
of Teesdale in mountain species. In this portion each of the drainage- 
districts is in turn passed in review, and its peculiarities, altitudes, 
and characteristic species are noticed. This part is very well done, 
and is a somewhat novel feature in a local Flora. 
In the enumeration of species, the nomenclature of the fourth volume 
of the ‘Cybele Britannica’ is followed. It appears that 937 out of 
the 1425 species there given are found in Northumberland and Dur- 
ham, but only 848 are considered genuine aborigines, 89 being weeds 
of cultivation, ete. Besides these, there are enumerated 87 stray gar- 
den plants and 117 plants of ballast, etc. ; in all, the Flora contains 
1141 species. But here again are discrepancies, the numbers on pp. 
109 and 306 differing. 
The comparison with Mr. Watson’s “types " gives some interesting 
results. As the authors express it, “ the characteristic of the north of 
England is, that it yields a fair proportion ” of southern and northern 
species, and, indeed, the prevalence of south-English plants is striking, 
26 “Germanic ” and 5 “ Atlantic” species occur. The province has 
80 fewer plants than Yorkshire, “the difference being caused almost 
altogether by the absence beyond the Tees of southern plants which 
run out in Yorkshire.” 77 species do not extend beyond the province 
northward into Scotland. The only peculiar plant is Arenaria uligi- 
nosa. Of Watson’s “intermediate” type Northumberland and Durham 
