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AMERICAN 
NATURALIST 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
Š IN THEIR WIDEST SENSE. 
MA NG DITORS 
Prors. E. D. COPE, Pea. anp J. S. KINGSLEY, Boston: 
SOCIATE DITOR 
H.C. M EKCEN Philabelphia: < 
Pror. E. A. ANDREWS, Baltimore, 
FEBRUARY, 1894. 
CONTENTS. 
PAGE, > 
l CHEMICO-PHYSIOLOGICAL - DISCOV- in Finland—The Inclusions in the Basalts of the : 
RDING THE CELL. P. M Crittenden. 9T |- Oberlausitz. — es 
[F CATION OF THE ARTHROPODA. J. 
Kinst 118 
Crysta'lizing  Sclurions — 
oF Raras IN THE OHIO VALLEY, 
New OEP ROE Ne ews— 
i NOTES ON THEIR UNUSUAL ages te IN 
W. Butler. 136 
Boss aso PampHigts.. .....°- = 147 
! URE.—Zirke?’ s New Text Book of 
-Zimmermann’s Botanical Microtech- 
Letters of Asa Gray—Orr’s Theory of 
and Heredity—The Wilder Quar- 
DE Ne a aE 
Zoology. hrpi of iie Freshwater Mee 
sa, Limnocodium sowerbii— Description of a New 
d Species of Arvicoline Rodent from the 
org States (Ilu-trated)—Desription of a 
Perognathus collected by J. K. Townsend in 1834 
(Hlustrated) Zoological , News. 
Entomology.—North American Pakia > 
Peculiar Ovıposition of an eats iene 
pal Development and ago——Sturyir 
Insect Hiari Behar o the eiA ppie ans a 1 
Sates) —— Nematodes 
gon-Flies—A AS “‘Tipulid 
PROCEEDINGS OF SCIENTIFIC SocteriEs. 
~ SCIENTIFIC News. 
