THE PHYSICAL GEOGRAPHY OF THE PAST. 
281 
In the year 1887 there appeared the first volume of a 
serial called “ The Naturalist,” conducted by B. Maund, 
F.L.S., and W. Holl, F.G.S. It contains a paper by Robert 
J. N. Streeten, M.D., entitled “ Observations on the British 
species of Myosotis.” Mr. Towndrow informs me that at 
page 178 M. collina, HofTm., is stated to occur “ near Hagley, 
Worcestershire.” I am not aware whether any subsequent 
volumes were published. Mr. Benjamin Maund was the 
author of an illustrated work on foreign plants, entitled 
“ The Botanic Garden.” 
(To be continued.) 
A CHAPTER IN THE PHYSICAL GEOGRAPHY 
OF THE PAST. 
PRESIDENTIAL ADDRESS 
GIVEN TO THE BURTON-ON-TRENT NATURAL HISTORY 
AND ARCHAEOLOGICAL SOCIETY. 
BY HORACE T. BROWN, F.G.S., F.I.C., F.C.S. 
(Continued from page 251.) 
But the rock has undergone a great change between 
Derbyshire and Cliarnwood. Instead of the thick, massive 
beds of limestone, of which we have never seen the base, and 
which must be at least from 4,000 to 5,000 feet thick in North 
Derbyshire, we find a rapid tailing off in thickness as Charn- 
wood is reached; a tailing off which at Grace Dieu, only 20 
miles south of the Derbyshire hills, has reduced the thickness to 
about 40 feet. At the same time the rock loses somewhat its 
purity, and becomes rather more earthy in character, but 
there is no intercalation of sandy beds. At Ticlmall, as some 
of you will remember, we have unmistakable evidence of the 
shelving nature of the bottom upon which the limestone was 
deposited. 
Taking all the evidence together, there can be no doubt 
that we are approaching once more a coast line, for the 
attenuation of the Mountain Limestone cannot be due to 
denudation, since we find it overlaid by the Limestone Shales 
and Millstone Grit. 
This new southern land must have been of an entirely 
different character from the continent bounding the sea to the 
north. That there must have been clear water nearly close 
up to the shore is proved by the existence of an organically 
formed limestone verv near the old coast line. That the land 
must have been of too small an extent to give rise to any 
