[PUBLISHED FOR THE CLUB]

WILLIAMS AND NORGATE,

14, HENRIETTA STREET, COVENT GARDEN, LONDON,
AND 7, BROAD STREET. OXFORD.

E. A. MINCHIN, M.A., F.Z.S. President's Address-Some Considera-

tions on the Phenomena of Parasitism amongst Protozoa

NOTES.

J. S. DUNKERLY, B.SC. Note on our Present Knowledge of the
Choanoflagellata (Plate 1)

NOTICES OF Books

PAGE

1

19

25

PROCEEDINGS, ETC.

Proceedings from October 26th, 1909, to February 22nd, 1910, inclusive

Forty-fourth Annual Report, 1909

Report of the Treasurer, 1909

PART No. 67, NOVEMBER 1910.

PAPERS.

A. E. HILTON.

The Life-phases of Mycetozoa

DAVID BRYCE.

109

On a New Classification of the Bdelloid Rotifera

(Plate 2)

EDWARD M. NELSON, F.R.M.S. Navicula rhomboides and Allied Forms

G. S. WEST, M.A., D.Sc., F.L.S. Some New African Species of

Volvox (Plate 3).

HENRY SIDEBOTTOM. Two New Species of Cassidulina (Plate 4)

CHARLES D. SOAR, F.R.M.S. A Contribution to the List of Hydrach.

nidae found in the East African Lakes (Plate 5)

NOTES.

JAMES BURTON. A Note on Two Instances of "Breaking of the

Meres"

115

A. C. BANFIELD. Note on a Sliding Nose-piece for use in Stereo-

photomicrography (fig. in text) .

121

NOTICES OF BOOKS

123

PROCEEDINGS, ETC.

Proceedings from March 22nd to June 28th, 1910, inclusive

Gossip Night.

Excursions, 1910

Obituary Notice-Mr. Walter Wesché

PART No. 68, APRIL 1911.

PAPERS.

T. B. ROSSETER, F.R.M.S. Hymenolepis upsilon, A New Species of

Avian Tape-worm (Plate 6)

CHARLES F. ROUSSELET, F.R.M.S. On Three New Species of

Rotifera (Plate 7)

E. A. MINCHIN, M.A., V.-P.Z.S., F.L.S.

.

147

161

President's Address: Some

165

181

199

203

Problems of Evolution in the Simplest Forms of Life

JAMES MURRAY, F.R.S.E., F.Z.S. Water-bears, or Tardigrada

(Plate 8). (Supplementary Notes) .

A. A. C. ELIOT MERLIN, F.R.M.S. On Some New Diatomic Struc-

ture discovered with a New Zeiss Apochromat .

EDWARD M. NELSON, F.R.M.S. On Dark-ground Illumination

NOTES.

JAMES BURTON. Note on Botrydium granulatum (L.) Grev.
R. T. LEWIS, F.R.M.S. Note on the Larva of Mantispa
EDWARD M. NELSON, F.R.M.S. A Note on the Amician Test

Proceedings from October 25th, 1910, to February 28th, 1911, inclusive 219

D. J. SCOURFIELD, F.Z.S., F.R.M.S. The Use of the Centrifuge in

EDWARD M. NELSON, F.R.M.S. On Methods of Illumination (fig. in

text)

E. PENARD, Dr. Ès Sc. On some Rhizopods from Sierra Leone.

NOTES.

PAGE

N. E. BROWN. Some Notes on Seeds as Microscopic Objects

T. A. O'DONOHOE, I.S.O. Dimorphism in the Spermatozoa of the

Flea and Blow-fly

EDWARD M. NELSON, F.R. M.S. An Improved Compound Microscope

by JAMES MANN (fig. in text)

NOTICES OF Books

Recent Additions to the Library

.

307

313

PROCEEDINGS.

Proceedings from March 28th to June 27th, inclusive.

List of Members .

PART No. 70, APRIL 1912.

327
i-xxxii

E. A. MINCHIN, M.A., F.R.S.

PAPERS.

President's Address-Speculations

with regard to the Simplest Forms of Life and their Origin

on the Earth

DAVID BRYCE. On Three New Species of Callidina (Plate 12)

CHABLES F. ROUSSELET, F.R.M.S. On Notholca triarthroides Skori-

kow, Cathypna brachydactyla Stenroos, and on a new Brachi-

onus from Devil's Lake, North Dakota (Plate 13)

HENRY SIDEBOTTOM. Lagenae of the South-West Pacific Ocean

(Plates 14-21)

E. M. NELSON, F.R.M.S. Notes on Exhibits (Plate 22, figs. 1 and 2).

A. A. C. ELIOT MERLIN, F.R.M.S. Notes on a Photograph of the

Secondary Structure of Navicula Smithii (Plate 22, figs. 3 and 4) 443

NOTICES OF Books

Proceedings from October 24th, 1911, to February 27th, 1912, inclusive 451