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then, if she happened to be at the top of the house at the time, there was no 
need that any one should intimate their visit, for the indications thereof 
pervaded the whole dwelling, and she soon called out to the servants “ to put 
the natives out !” For the other picture, we will allow M. de Quatrefages to 
choose his subject amongst those enlightened audiences to whom his eloquent 
discourses are delivered, and then let him show us any two individuals, in the 
same race of anivials, which present so wide a difference as do these. 
The author, too, exhibits a little weakness, in refusing (as he often does) 
to admit palaeontological evidence, excepting where, as a special pleader, it 
answers his purpose so to do ; for instance, in the case of the remains found 
in “ bone caverns.” And again, we cannot reconcile his admission of the 
possibility that man may one day be able to form new species, as well as new 
varieties, with the contents of his chapter on the fixity of species. 
But if these be indications of feebleness or contradiction in his argument, 
they are more than atoned for by the boldness with which he enters the 
enemy’s camp ; takes up the weapons of Mr. Darwin, and employs them to 
defend the “immutability of species” in general, and the unity of our own. 
What influence our author’s reasoning will have upon the views of the 
naturalist referred to we are unable to conjecture. 
Will Mr. Darwin clip his mugs, and cease to speculate ? or will he thank 
M. de Quatrefages for having accompanied him thus far on his journey, and 
bidding him farewell, travel on alone ? 
Will he believe in the fixity of species, or exclaim : “ In comparison with 
your extra pairs of toes and fingers, transmitted from generation to genera- 
tion, or with your scaly skins, inherited by one family after another, my 
elongations of the neck or legs are mere trifles ” ! 
He may say, “ It is you, not I, who create new species by 1 hereditary 
transmission of peculiarities,’ the ‘struggle for existence,’ and your ‘ milieu or 
he may, on the other hand, agree that what he has regarded as a permanent 
moulding, and, as it were, a creative cause of new species, Is only a wise 
modification of existing species within the limits of varieties and races, to 
adapt them to the varying influences of nature. 
We are not a partisan ; and leave our two eminent inquirers to reconcile 
their differences, and seek earnestly to arrive at the truth. 
After what we have said, we feel sure no further recommendation of M. de 
Quatrefages’ book is necessary. It is the work of a great naturalist, a pleasing 
writer, and a most instructive teacher, and (as already stated) is sure of a 
welcome in England whenever it shall be translated into our language. 
HE reader must acquit us of the desire to perpetrate a pun, -when we 
say that nowadays every art and every science has its peculiar 
“ scope zoology and botany their microscope ; physics its telescope and 
gyroscope ; photography its stereoscope ; ornamentation its debuseope ; 
* “A Practical Treatise on the Use of the Ophthalmoscope.” By J. W. 
Hulke, F.R.C.S. Churchill. 
THE OPHTHALMOSCOPE. 
