VoL. XXXII, No. 37%- JULY, 1898 
THE 
AMERICAN 
NATURALEISL 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE f 
CONTENTS 
I. Dentition of Devonian Ptyctodontide . . . . =. C. R. EASTMAN 
II. A List of the Mammals of Labrador . OUTRAM BANGS 
III. Variation in the Number of Ray Powers in the White Daisy i F. C. LUCAS 
IV. The Development of Mantis ` T. D. A. COCKERELL 
V. Editorials: The Fiftieth pe of re American Association for the 
Advancement of Science — Card Bibliographies — Methods in Systematic 
Work. 
VI. Reviews of Recent Literature: Zoölogy, a Skeleton of the Cat, Rabbit 
Anatomy, Stomach Movements, Paired Fins of Fishes, Anatomy of- Salpa, 
Relationships of : : 
of the Missouri Toni Garden, Sur le genre ye Sini mondsie, Contact mia 
Gneisses of Anglesey, Syenite Porphyries of the Lake Champlain District, A 
Study in Weathering, Notes — Geology, Lavas and Soils of the Hawaiian 
Islands. 
VII Scientific News. 
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