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Parts X.-XI.—Yol. XVIII ] [JULY 16—MAR. 1917. 
The 
Essex Naturalist: 
BEING THE JOURNAL OF THE 
ESSEX FIELD CLUB. 
Edited by WILLIAM COLE, Assoc.L.S., 
Honorary Secretary and Curator 
[assisted, in the case of this Part, by MILLER CHRISTY, F.L.S.] 
Content*. page 
The Study of Pre-History in Essex, as Recorded in the Journal 
of the Essex Field Club. By S Hazzledink YVakrkn, F.G.S., 
(Presidential Address) (concluded) .. .. .. ..153 
Ptilidium pulcherrimum (Web.) Hampe. in Epping Forest. By 
Joseph Ross .. .. .. .. ..187 
The Corncrake in Essex By Fred J. Stubbs .. ..189 
Mycetozoa in the Chingford District of Epping Forest in August 
and September 1915 and 1916. By Joseph Ross .. .. 192 
The Essex Field Club Reports of Meetings, 8 April 1916 to 
31 March 1917 .. .. .. .. .. 194 
John Gibbs (1822-1903), an Essex Botanist; Supplementary Note. 
By Miller Christy, F.L.S. .. .. .. .. 203 
Notices of two New Books .. .. .. .. 205 
A Short History of the Study of Mycetozoa in Britain, with a 
List of Species recorded from Essex. By Miss Gulielma Lister, 
F.L.S. (Presidential Address) .. .. .. .. 207 
Inserted Loosely :— Plate III. (to face p. 135). 
The Authors alone are responsible for the statements and opinions con taint'd in 
their respective papers. 
PUBLISHED BY THE CLUB, AT THE ESSEX MUSEUM OF 
NATURAL HISTORY, STRATFORD, ESSEX. 
Editorial communications to W. COLE, Essex Museum, Romford Road, Stratford, 
and Advertisements to Messrs Bf.nham and Company, Limited, 
Printers, Colchestei. 
Published February 1918 J 
Price, to Non-Members, 5/-. 
