236 BOTANICAL GAZETTE [SEPTEMBER 
sive through the failure of the unpaired gene in the heterozygotes to produce 
a visible effect. 
A number of excellent text figures and six plates, five of them colored, add 
greatly to the attractiveness of the book, and the press work leaves nothing 
to be desired. 
This little manual is worthy of an even larger measure of the appreciation 
which has been given to its two preceding editions by those engaged in other 
scientific fields, and by general readers who are not themselves engaged in 
science, but who like to keep themselves informed on the advances that are 
being made in science.—GrEo. H. SHULL. ° 
MINOR NOTICES 
Alpine plant life.—In an attractive volume intended for the general 
reader, ARBER‘ has described the plant life of the higher altitudes of the Swiss 
Alps. The plants are treated in ecological groups, and an evident effort has 
been made, not unsuccessfully, to maintain the ecological point of view through- 
out. It might be questioned if most modern ecologists would find as many 
beautiful adaptations as are evident to the author, who declares that not only 
the color of the flowers, but the density of their pigment ‘“‘may be primarily 
due to a specialization in favor of a particular class of insect visitor.” Other 
adaptations of alpine plants receive considerable attention, and the probable 
origin of the alpine flora is briefly discussed. 
The text is pleasing in style, the descriptions are accurate and profusely 
illustrated by more than 75 excellent plates and figures. A glossary of botani- 
cal terms and a chapter on the structure of the flower should make all the 
descriptions intelligible even to the reader who is entirely without scientific 
training.—Gero. D. FULLER. 
NOTES FOR STUDENTS 
Cecidology.—The anatomy and histology of insect galls continues to 
be an interesting and profitable field not only for the entomologist, but also 
for the plant pathologist and the experimental biologist. _WEIDEL’ gives us 
a valuable study of the life history of the gall of NV euroterus vesicator Schlecht. 
— the gall characters which are recognized by the zoologist to a 
owth enzyme,” he discusses his methods. These methods are well worthy 
4 ARBE . A. NEWELL, Plant life in alpine Switzerland. 8vo. pp. xxiv+355- 
pls. 47. pans gp London: John Murray. toto. $1.50. 
5 WEIDEL, F., Beitrige zur Entwicklungsgeschichte und vergleichenden Anatomie 
der Cynpidengallen der Eiche. Flora 102:279-334. pl. 15. figs. 49. I9gtt. 
