VOL. XXXIV, NO. 406. OCTOBER, 1900 
THE 
AMERICAN 
NATURALIST 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE 
CONTENTS 
PAGE 
I. Reconsideration of ee Evidence for a Common Dinosaur-Avian 
Professor H. F. OSBORN 777 
The Gall of the canine Pine : . W.A. CANNON 801 
Note on Distomum Arcanum (N. Sp. ) in Ark | Fro Ogs 
Professor W. 8, NICKERSON 811 
Instinct or Reason! . . G. W, and E. G. PECEHAM 817 
. Editorial Comment: Doubtful Nnm. Frazer's Life of Cope, 
The Biological Bulletin 
VI. Reviews of Recent Literature: Psychology, Individual Vedan Eo 821 
of the Crayfish, The Problem of Innate Ideas, Empirical T 
43 HH 
Zoülogy, The Effect of Staleness of the Sex-Cells upon Siding Pro- 823 
tozoan Studies, The aie tae Scientific Results of H. M. S. “ Thetis,” 
The Temple Primers, The Biological Bulletin, Notes — Botany, Text- 828 
830 
Book of Botany, ed —Paleontology, Fossil Cephalopods in the Timan, 
Russian Carboniferous Cephalopods 
VII. News 832 
VIII. Publications Received 
BOSTON, U.S.A. 
GINN & COMPANY, PUBLISHERS 
9-13 TREMONT PLACE 
Chicago London 
37 Bedford Street, Strand 
New York g! 
70 Fifth Avenue 378-388 Wabash Avenue 
pe Ot a tas 
Entered at the Past-Office, Boston, Mass., as Second-Class Mail Matter 
