CONTENTS 
{All rights reserved) 
PAGE 
Drew, G. H. Some notes on Parasitic and other Diseases of 
Fish. (Plate II.).193 
Aders, W. M. Herpetomonas aspongopi. (2 Figures.) . . 202 
Nutt all, George H. F. and Graham-Smith, G. S. Theileria 
parva: Attempts at Cultivation ...... 208 
Nuttall, George H. F. and Graham-Smith, G. S. Note on 
Attempts to Infect the Fox and the Jackal with Piroplasma 
canis .... .211 
Nuttall, George H. F. and Graham-Smith, G. S. Notes on 
Immunity in Canine Piroplasmosis . . . . .215 
Nuttall, George H. F. and Hadwen, S. Further Experiments 
upon the Drug Treatment of Canine Piroplasmosis . . 229 
Nuttall, George H. F. and Hadwen, S. The Drug Treatment 
of Piroplasmosis in Cattle. (7 charts.).236 
Mackinnon, Doris L. Observations on the Division of Spiro- 
chaetes. (2 Text-Figures.).267 
Mackinnon, Doris L. Observations on the Effect of Various 
Chemical Reagents on the Morphology of Spirochaetes. 
(4 Figures.).281 
Mackinnon, Doris L. Note on two new Flagellate Parasites in 
Fleas— Herpetomonas ctenophthalmi, n. sp., and Crithidia 
hystrichopsyllae, n. sp. (Plate III.).288 
McCoy, George W. and Mitzmain, Maurice B. The regional 
Distribution of Fleas on Rodents.297 
Petrie, G. F. and Avari, C. R. On the Seasonal Prevalence of 
Trypanosoma lewisi in Mus rattus and in Mus decumanus 
and its Relation to the Mechanism of Transmission of the 
Infection .......... 305 
PARASITOLOGY will be published about four times a year. The 
numbers will afterwards be issued in volumes each containing four numbers 
and amounting to between 400 and 500 pages, with plates and figures. 
Papers for publication should be sent to Professor Geo. H. F. 
Nuttall, F.R.S., 3 Cranmer Road, Cambridge, or to the Associate Editor. 
Other communications should be addressed to the University Press, 
Cambridge. 
Papers forwarded to the Editors for publication are understood to be 
offered to PARASITOLOGY alone, unless the contrary is stated. 
Contributors receive fifty copies of their papers free. Additional copies, 
not exceeding 200, may be had at cost price : these should be ordered when 
the final proof is returned. 
The subscription price is £1. Is. per volume (post-free), payable in 
advance; single numbers 7s. net (double number 14s. net). Subscribers to the 
Journal of Hygiene may obtain single numbers of PARASITOLOGY at the 
reduced price of 5s. net, or may become subscribers at the reduced rate of 
15s. per volume. Subscriptions may be sent to any Bookseller, or to 
Mr C. F. CLAY, Manager, Cambridge University Press, Fetter Lane, 
London, E.C. 
