516 The American Naturalist. [Jnne, 
able features may be mentioned the uniformity which pervades the 
whole work, and this extends to a uniform notation of the veins of the 
wings, a thing which has long been lacking. We cannot dismiss our 
notice of this work without mention of the beautiful illustrations from 
the graver of Mrs. Comstock. For years the illustrations of Flint’s 
edition of Harris have been the standard for wood-cuts of insects, but 
in not a few instances has Mrs. Comstock surpassed Mr. Marsh. We 
have no doubt about the sale of the present work ; every entomologist 
will want it, and we know of no better book to put in the hands of 
those youth who persist in bringing all sorts of bugs into the house. 
Yet we regret certain features in the work, for which, doubtless, there 
was good reason. Thus the lack of reference to the literature of the 
different groups, a feature found in the part of the “ Introduction” 
already published is a serious omission. Then, too, we could have 
wished more morphology and a little outline of the development of 
insects, while we could have wished for portions on geographical distri- 
bution, mimicry and other means of protection, etc. But we forget all 
these lacks when we look at Fig. 190, which ought to have appeared in 
_ the “ Fliegende Blatter.” 
The Cell.’—The want of a good comprehensive account of the 
Anatomy and Physiology of the Cell has induced Dr. H. J. Campbell 
to edit an English translation of Dr. O. Hertwig’s valuable treatise on 
this subject. In the author's preface Dr. Hertwig states that in this 
work he has endeavored to fix the standpoint occupied at present by 
the doctrines of cell and tissue formation, ahd to delineate the histori- 
cal course of the development of the more important theories. The 
points discussed in the several chapters are: the chemico-physical and 
morphological properties of the cell, the vital properties, vital phe- 
nomena, metabolic changes occurring between protoplasm, nucleus and 
cell products, and theories of heredity. Each of these topics is ex- 
haustively considered, and a very full bibliography is given of the sub- 
ject under discussion. 
The work abounds in cuts illustrating the text. 
Elementary Text-Book of Entomology.’—This book, of which 
the recent edition has just been issued, is intended as an introduction to 
2The Cell: Outlines of General Anatomy and Physiology. By Dr. Oscar Hert- 
wig. Translated by M. Campbell and edited by H. J. Campbell, M.D. New 
York, 1895, Macmillan & Co., $3.00. 
3 Elementary Text-Book of Entomology. By W. F. Kirby, F. L. S., F. E. S. 
Second edition, revised and augmented, with 87 plates, containing over 650 fig- 
ures. London : Swan, Sonnenschein & Co. New York: Macmillan & Co., 1892. 
