CONTENTS. 
V 
PAGE 
Cytological Observations on the Early Stages of Segmentation of 
Echinus Hybrids. By L. Doncaster, M.A., Fellow of King’s 
College ; and J. G-rat, B. A., Scholar of King’s College, Cambridge. 
(With Plates 28 and 29) . 
. 483 
The Life-Cycle of Moina rectirostris. By the late G. H. 
Grosvbnob, M.A., New College, Oxford, and Geoffrey Smith, 
M.A., New College, Oxford 
. .511 
On Methods of Producing Artificial Parthenogenesis in Echinus 
esculent us and the Bearing of the Parthenogenetic plutei 
through Metamorphosis. By Cresswell Shearer, University 
Lecturer in Experimental Morphology, Cambridge, and Dorothy 
Jordan Lloyd, Bathurst Student, Newnham College, Cam- 
bridge. (With Plates 30 to 32) . . . . 523 
Changes in Chondriosomes Occurring in Pathological Conditions. 
By J. O. Wakelin Barratt. (From the Cancer Research 
Laboratory, University of Liverpool.) (With 11 Text-figures) . 553 
nONTENTS OF No. 232, N.S., MARCH, 1913. 
MEMOIRS; 
The Problem of Mitosis. By C. P. U. Meek, M.Sc., F.L.S., E.Z.S. 567 
On the Afferent Ganglionated Nerve-fibres of the Muscles Inner- 
vated by the Fifth Cranial Nerve, and on the Innervation of 
the Tensor Veli Palatini and Tensor Tympani. By F. H. 
Edgeworth, M.D., Professor of Medicine, University of Bristol. 
(With Plates 33 to 36) . . - • 593 
On the Nematodes of the Common Earthworm. By Gilbert E. 
Johnson, M.Sc.(Birm.), University of Birmingham ; Board of 
Agriculture and Fisheries Research Scholar. (Studies from the 
Research Department in Agricultural Zoology, University of 
Birmingham.) (With Plate 37 and 2 Text-figures) . 605 
The Structure and Biology of Schizoneura lanigera, Haus- 
mann — Woolly Aphis of the Apple Tree. Part I. — The Apterous 
Viviparous Female. By J. Davidson, M.Sc. (Liverpool). 
(From the Cooper Laboratory for Economic Research, Watford, 
Herts.) (With Plates 38 to 42 and Text-figures A — D) . 633 
n Account of the Anatomy and Homology of the Adipose Lobe of 
tlie Pelvic Fin of the Salmon. By Edward W. Shann, B.Sc., 
Demonstrator and Assistant Lecturer in Zoology in the Victoria 
University of Manchester. (With Plate 43 and 3 Text-figures) 703 
Title, Index, and Contents. 
VOL. 58, PART 4. — NEW SERIES. 
b 
