CONTENTS OF SUPPLEMENT, 1885.—New Series. 
MEMOIRS: 
The Circulatory and Nephridial Apparatus of the Nemertea. By A. 
C. OupEmans, Conservator at the Zoological Museum of the Uni- 
versity of Utrecht. (With Plates I, II, and III) . 
The Later Stages in the Development of Balanoglossus Kowa- 
levskii, with a Suggestion as to the Affinities of the Enteropneusta. 
By W. Barsson, B.A., Scholar of St. John’s College, Cambridge. 
(With Plates IV, V, VI, VII, VIII, and IX) 
Some Notes on the Early Development of the Rana temporaria. 
By W. Batpwiy Spencer, B.A., Scholar of Hxeter College, Oxford. 
(With Plate X) 
Notes on Hehinoderm Morphology, No. IX. On the Vascular System 
of the Urchins. By P. Herpert Carpenter, D.Sc., Assistant 
Master at Eton College 
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