CONTENTS 
CONTENTS OF No. 225, N.S., AUGUST, 1911. 
MEMOIRS : eage 
The Spermatogenesis of Lepidosiren Paradoxa. By W. E. 
Agar, M.A., D.Sc., Zoological Laboratory, Glasgow University. 
(With Plates 1-5 and 1 Text-figure) . . 1 
Studies in the Experimental Analysis of Sex. By Geoffrey 
Smith, M.A., Fellow of New College, Oxford. Part 6. — On the 
Cause of the Fluctuations in Growth of the Fowl’s Comb. 
(From the Department of Pathology, University of Oxford.) 
(With Plates 6-9 and 5 Text-figures) . . .45 
Further Observations on the Caecal Parasites of Fowls, with some 
reference to the Rectal Fauna of other Vertebrates. Part I. 
By C. H. Martin, M.A., Demonstrator of Zoology at Glasgow 
University, and Muriel Robertson, M.A., Junior Assistant to 
the Professor of Protozoology in the University of London. 
(With Plates 10-14 and 4 Text-figures) . . .53 
On Some Points in the Anatomy and Bud-Formation of Lim- 
nocnida tanganicae. By Charles L. Boulenger, M.A., 
Lecturer on Zoology in the University of Birmingham. (With 
Plate 15 and 3 Text-figures) . . . .63 
CONTENTS OF No. 226, N.S., NOVEMBER, 1911 
MEMOIRS : 
Contributions to the Study of Pathogenic Amoebae from Bombay. 
By W. Glen Liston, Major I.M.S., and C. H. Martin, B.A., 
Demonstrator of Zoology, Glasgow University. (With Plates 
16-18) . . . . . . .107 
The Division of the Collar-cells of the Calearea Heterocoela. By 
Muriel Robertson, M.A. (With Plate 19) . . 129 
Observations on the Trypanosome of the Little Owl (Athene 
noctua), with Remarks on the other Protozoan Blood-Parasites 
occurring in this Bird. By E. A. Minchin, M.A., F.R.S., and 
H. M. Woodcock, D.Sc. (With Plates 20 and 21) 
141 
