CONTENTS OF No. 259.—New Series. 
MEMOIRS: 
PAGE 
The Proboscis of the Syllidea. Part I. Structure. By W. A. Has- 
WELL, M.A., D.Sc., F.R.S., Emeritus Professor of Biology, reyes 
of Sydney. (With Plate 15)... 7 ; ; : . 323 
The Life-history of Melicertidium octocostatum Re, 
a Leptomedusan with a theca-less Hydroid Stage. By Prof. James 
F. GEMMILL, University College, Dundee. (With Plate 16) . - 339 
On the Blood-Vascular System of the Karthworm Pheretima, and 
the Course of the Circulation in Karthworms. By KARrM NARAYAN 
BAHL, D.Sc., of the Muir Central College, Allahabad, India. Bas 
il Text- fgtizes) : ‘ ‘ : ‘ . 3849 
The Development of the Ovary and Ovarian Egg of a Mosquito, 
Anopheles maculipennis, Meig. By ‘A. J. NICHOLSON, 
M.Sc. (Birmingham). (With Plates 17-20) . Ff é : . 395 
On the Bionomics and Post-Embryonic Development of certain 
Cynipid Hyperparasites of Aphides. By MAup D. HAVILAND, 
Research Fellow of Newnham College. (With 11 Text-figures) . 451 
Notes on the Larval Skeleton of Spatangus purpureus. By 
HIROSHI OHSHIMA, Asst. Professor in the Department of Agricul- 
ture, Kyushiu Imperial University, Fukuoka, ane (With 
Plate 21). : ‘ , F : ‘ : . 479 
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