CONTENTS 
CONTENTS OF No. 213, N.S., SEPTEMBEE, 1909. 
MEMOIRS : page 
Development and Origin of the Respiratory Organs in Araneae. 
By W. F. Purcell, Ph.D., Bergvliet, Diep River, near Cape 
Town. (With Plates 1 — 7, and 7 Text-figures) . . 1 
Notes on the Nephridia of Dinophilus and of the Larvae of 
Polygordius, Echiurus, and Phoronis. By E. S. Goodrich, 
F.R.S., Fellow of Merton College, Oxford. (With Plate 8) . Ill 
Further Notes on a Trypanosome found in the Alimentary Tract 
of Pontobdella muricata. By Muriel Robertson, M.A., 
Carnegie Research Fellow ; Junior Assistant to the Professor of 
Protozoology in the University of London. (With Plate 9, and 
5 Text-figures) ...... 119 
CONTENTS OF No. 214, N.S., OCTOBER, 1909. 
MEMOIRS : 
Dendrosoma radians, Ehrenberg. By Sydney J. Hickson, D.Sc., 
F. R.S., Beyer Professor of Zoology in the University of Man- 
chester, and J. T. Wadsworth. (With Plate 10) . . 141 
On the Structure of the Excretory Organs of Amphioxus. Part 2. 
— The Nephridium in the Adult. Part 3. — Hatschek’s Ne- 
phridium. Part 4. — The Nephridium in the Larva. By Edwin 
S. Goodrich, F.R.S., Fellow of Merton College, Oxford. (With 
Plates 11 — 16 and 1 Text-figure) .... 185 
Intra-cellular and General Digestive Processes in Planariae. By 
G. Arnold, from the Cytological Laboratory of the University 
of Liverpool. (With Plate 17) . . . . 207 
Professor Hubrecht’s Paper on the Early Ontogenetic Phenomena 
in Mammals ; an Appreciation and a Criticism. By Richard 
Assheton, M.A., Trinity College, Cambridge; Lecturer on 
Biology in the Medical School of Guy’s Hospital, in the Univer- 
sity of London. (With 5 Text-figures) . . . 221 
