CONTENTS. 
CONTENTS OF No. 205, N.S., JANUARY, 1908. 
MEMOIRS: 
Spirocheta (Trypanosoma) balbianii (Certes) and Spiro- 
cheta anodonte (Keysselitz): their Movements, Structure, 
and Affinities. By H. B. Fanruam, B.Se.(Lond.), A.R.C.S., 
Derby Research Scholar and Assistant in the Zoological Depart- 
ment, University College, London; and St. Mary’s Hospital 
Medical School. (With Plates 1—3, and 11 Text-figures) 
The Structure and Life-History of Copromonas subtilis, nov. 
gen. et nov. spec.: a Contribution to our Knowledge of the 
Flagellata.. By C. Currrorp Dopertt, B.A., Scholar of Trinity 
College, Cambridge. (With Plates 4 and 5, and 3 Text-figures) 
Notes on Some Parasitic Pretists. By C. Cuirrorp Dose1t, 
B.A., Scholar of Trinity College, Cambridge. (With Plate 6) 
Studies in Spicule Formation. VIII.—Some Observations on 
the Scleroblastic Development of Hexactinellid and other Sili- 
ceous Sponge Spicules. By W. Wooptanp, The Zoological 
Laboratory, King’s College, London. (With Plate 7) 
CONTENTS OF No. 206, N.S., MARCH, 1908. 
MEMOIRS: 
Investigations on the Development of Trypanosomes in the Tsetse- 
Flies and other Diptera. By E. A. Mincutn, Professor of Pro- 
tozoology in the University of London. (With Plates 8—13, 
and two Text-figures) ‘ : : : ; 
The Nematocysts of Turbellaria. By C. H. Martin, B.A., Mag- 
dalen College, Oxford. (With Plate 14) : 
Doridoeides gardineri: a Doridiform Cladohepatic Nudi- 
branch. By Sir Cuartzs Exior, Vice-Chancellor of the Uni- 
versity of Sheffield, and T. J. Evaws, Lecturer in Zoology in 
the same University. (With Plates 15 and 16, and one Text- 
figure) : : 
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