I JUNE-JULY, 1912 



VOL. XXVI, Nos. 3 and i 



THE 



OTTAWA 

 I NATURALIST 



V 



Published by The Ottawa Field-Naturalists' Club. 



BOttor: 

 ARTHUR GIBSON, 



Cbntral Ejcpbrimbntal Farm. 

 OTTAWA. 



associate EOitotS: 



Harlan I. Smith, W. H. Harrington, P. A. Taverner, 



Anthropology. Entomology. Ornithology. 



W. T. Macoun, H. M. Ami, D.Sc. L. M. Lambe, F.G.S., 



Botany. Geology. Palaeontology. 



Prof. John Macoun.M.A. Otto Klotz, LL.D. C Gordon Hewitt, D.Sc, 



Conchology Meteorology. Zoology. 



CONTENTS: 



On two new Crinoids from the Trenton Formation of Ontario. By 



W. A. Parks and F. J. Alcock. 41 



A Fossil Starfish with Ambulacral Covering Plates. By George 



H. Hudson - ------- 46 



The Evolution of the Worlds. By J. S. Plaskett 52 



Excursions - ---------- 60 



Note 60 



The Rolla L. Grain Co., Limited 



ISSUED JULY 22, 1912 '-A r_^ 



Mnttrii at t\t Ottavta Pott Office a* teoond claec mattm*.'^ 



as 







