CONTENTS 
(All rights reserved) 
Portrait Plates VIII—XI: Edward Jenner, Richard Owen, 
Athanasius Kircher, Robert Boyle 
PAGE 
Boulenger, C. L. On some Nematode Parasites of the Camel 
in India. (With 3 Text-figures).311 
Boulenger, C. L. Strongylid Parasites of Horses in the Punjab. 
(With 5 Text-figures).315 
Cunliffe, N. Some Observations on the Biology and Structure 
of Ornithodorus moubata , Murray. Together with a Note on 
the External Characters which serve to differentiate the Sexes 
by G. H. F. Nuttall. (With Plate XVI and 5 Text-figures) . 327 
MacGregor, Malcolm E. The Influence of the Hydrogen-Ion 
Concentration in the Development of Mosquito Larvae. 
Preliminary Contribution ....... 348 
Duke, H. Lyndhurst. On the Zoological Status of the Poly¬ 
morphic Mammalian Trypanosomes of Africa and their 
Relation to Man. (With 1 Text-figure) .... 352 
Nuttall, George H. F. Notes bearing on Leeuwenhoek, Redi, 
Linnaeus, de Geer, Rudolphi, Muller, Leidy, Owen, Jenner, 
Kircher and Boyle, whose portraits have appeared in 
Parasitology , Vol. xm. (Portrait-plates I—XI) . . . 398 
Index of Authors.408 
Index of Subjects.410 
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