1 86 HAZZLEDINE WARREN STUDY OF PRE-HISTORY IN ESSEX. 
Well Sections (W. Whitaker, Trans., iv., 1885, pp. 149-170 ; 
E.N., iii., 1889, pp. 44-54 ; vi., 1892, pp. 47-60 ; ix., 1895, 
pp. 167-190). 345 
(Vide also E.N., v., pp. 204, 216, 217 ; vii., 1893, p. 27 ; 
x., 1897, p. 136 ; xiv., 1907, pp. 260-262 ; xv., 1908, pp. 
I 37~ I 39 1 xvii., 1913, p. no) [126]. 346 
XXVIII.— Personal. 
Brady, Antonio (R. Meldola, T. & P., iii., 1883, p. 94). 347 
Howard, J. Eliot (G. S. Boulger, Trans., iv., 1884, pp 1-8) 348 
Morris, John (T. V. Holmes, Proc., iv., 1886, p. clxxxiii.) 349 
Russell, Champion (E. A. Fitch and W. Crouch, E.N, i., 1887, 
pp. 138-139). 350, 
Brown, John (A. P. Wire, E.N., iv., 1890, pp. 158-168 ; T. V. 
Holmes, 1895, p. 263) [58]. , 351 
Saxton, Christopher, and the oldest map of Essex (J. Avery, 
E.N., xi., 1898, p. 240) [343]. 352 
Flower, William (W. Crouch, E.N., xi., 1900, p 243). 353 
Pitt-Rivers (F. W. Reader, E.N., xi., 1900, pp. 245-251) 354 
Wilson, T. Hay (T. V. Holmes, E.N., xii., 1901, pp. 60-62) 355 
Durrant, Edmund (E.N., xii., 1902, pp. 171-172). 356 
Walker, Henry (E.N., xii., 1902, pp. 173-175). 357 
Cole, William, presentation to (Miller Christy, E.N., xiv., 
1906, pp. 117-135)- 358 
The Pupation-Cell of Dytiscus marginalis. —At the 
meeting of the Club on 27th January 1917, Mr. Hugh Main, 
B.Sc., F.E.S., exhibited a pupation-cell of D. marginalis 
found in the bank of a pond in Epping Forest. He said that 
he had discovered a number of such cells last autumn, and 
that they were usually placed near the margin of the pond, 
in the angle where the bank rose vertically Irom a level shell 
of earth, sometimes two or three feet from the water. There 
was no external evidence of their presence, but were revealed 
by careful probing with the point of a knife in suitable localities. 
Mr. Main also showed stereoscopic photographs of the pupa 
and the perfect insect in the pupation-cell. The pupa was 
seen to be resting stretched across the cell, dorsal surface upper¬ 
most, supported only on the anterior rim round the head and 
the two processes at the posterior end of the body. Inside 
the pupation cell remained the empty skin of the larva. 
The specimen was presented to the Club’s museum. 
