186 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.
137-139 ; xvii., 1913. p. 110) [126]. 346
XXVIIL—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 from a level shelf
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.