AMERICAN ~ 
NATURALIST 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE. 
ANAGING EDIT 
be Prors. E. D. COPE anp J. di Enana: 
gone: EDITORS: 
Dr. C. O. WHITMAN, ; C. E. BESSEY, THOMAS WILSON, 
Pror. C. M. WEED, Pror, W. S. BAYLEY, Pror. E. A. ANDREWS: 
DECEMBER, 1892. 
CONTENTS. 
PAGE, 
Tue ORIGIN OF a, A CHAPTER IN EVOLUTION. l ppi Section—Geology of the Crazy Mountains — 
s Morris. 975 | —Geological Survey of New Jersey, 1891—A Hy 
i z W. Conn. 987 | ena aa ‘Odie Carnivora from Texas—Geological — 
i STRIPED HARVEST-SPIDER; A STUDY IN | | News, gar AE 
VARIATION. (Ilustrated.) Clarence M. Weed. 999 | Cenozoic. : 
T Is AN “ ACQUIRED CHARACT =a Botany. -Development of the Floral Organs i in 
. C. Nutting. 1009 | Aster and Solidago. 
CN o | Zoology —On Nectonema agile Verrill—Linton : 
- 404 Le on En fore a aa me 5 Arran the Am of the ae 
“ge ae f o irds—Shufeldt on the Anatomy 6! z 
i Booxs anp PAMPHLET. i - + 1016 | Humming” -Birds and n E wine n , 
—The Sodik of Moan ore Se 
è TURE. 
x aerea Element ; | 
ary B iology—Apgar’s s Trees | 
of the Northern United States—Bailey’s Rule | digi in ERAAI on nce — 
Book—Brehm’s Thierlebe: | ment—Embryology of a Nem e—Not 
og inated). erry 1019 | Abnormal Polygordius Larva. “aoa r 
2 : cig tec PEET Functions of the Nervous 
Sings ons Paleonto ology.—American Devonian | System of the Bo > 
found i n Belgium—The e Geology of Borneo | PROCEEDINGS OF SCIENTIFIC Societies... 
ates and Marls of Alabama—Keyes’ Miss- , SCIENTIFIC News. . - : 
PHILADELPHIA, U. S. A. 
BINDER: & KELLY. 
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