^lP6/^'3 
Mabch 3, 1923. Price IQs 
THE JOUENAL 
OF 
THE LTNNEAN SOCIETY, 
Vol. XXXV. ZOOLOGY. No. 233. 
CONTENTS. 
Page 
I. The Wing- Venation o£ the Order Plectoptera or Mayflies. By 
R. J. TiLLYARD, M.A., Sc.D. (Cantab.), D.Sc. (Sydney), F.L.S., 
C.M.Z.S., F.E.S., Entomologist and Chief of the Biological 
Department, Cawthron Institute, Nelson, N.Z. (With 10 Text- 
figures.) 143 
II. The Structure of Certain Palseozoic Dipnoi. By D. M. S. 
Watson, F.R.S., and E. L. Gill, M.Sc. (Communicated by 
Prof. E. S. GooDEiCH, F.R.S., Sec.L.S.) (With 34 Text- 
figures.) 1 63 
LONDON: 
SOLD AT THE SOCIETY'S APARTMENTS, BURLINGTON HOUSE, 
PICCADILLY, W.l, 
AND BY 
LONGMANS, GREEN, AND CO., 
AND .^-^i^v '!'*«•• ('(^T^'X 
WILLIAMS AND NORgfA^E '%1\ 
1923. 
