REVIEWS. 223 
the sun, and looking into the atmosphere very near it, solid par- 
ticles in the air can be seen most plainly, and doing this at that 
place, the air seemed filled with grasshoppers in flight, myriads of 
them, extending high enough to appear as the finest specks, even 
with a field-glass. They certainly ranged some hundreds of feet 
above that summit in immense numbers. An occasional butterfly 
was seen also on the summit, but they were few. 
Several species of flies are peculiarly abundant at 8,000 to 
12,000 feet, which at times nearly set our animals frantic, but the 
most voracious kinds were troublesome only when the sun shone 
—even a passing cloud would drive them out of sight. 
REVIEWS. 
THe Genesis or Species.*— Among the works called out by 
Darwin’s epoch-making work, as the Germans happily style it, 
the present volume stands preéminent. It is a series of criticisms 
by a thorough evolutionist, and one who was originally a Darwin- 
ian. It will interest-the genera] reader, the style being clear and 
attractive, and the spirit of the author thoroughly candid and calm. 
The author is well known in scientific circles by his original papers 
on the anatomy of certain of the vertebrates. 
The object of the book is ‘‘to maintain the position that ‘ Nat- 
ural Selection’ acts, and indeed must act, but that still, in order 
that we may be able to account for the production of known kinds 
of animals and plants, it requires to be supplemented by the ac- 
tion of some other natural law or laws as yet undiscovered.” Far- 
ther on he says “The view here advocated, on the other hand, 
regards the whole organic world as arising and going forward in 
one harmonious development similar to that which displays itself 
in the growth and action of each separate individual organism. 
He thus sums up the difficulties against Darwinism, or the doc- 
trine of “survival of the fittest” maintaining : —- 
* On the Genesis of Species. By St. George Mivart, a pea London. Macmillan & 
Co. 1871. 12mo, pp. 296. With numerous wood cuts. 
