CONTENTS OF No. 198.-New Series. 



MEMOIRS : 



PAGE 



The Hsemoflaj^ellates : a Review of Present Knowledge relating to 

 the Trypanosomes and allied forms. {Cotitinued from p. 231.) 

 By H. M. Woodcock, D.Sc.Lond. (With Text-figures.) . 233 



Notes on the Development, Structure, and Origin of the Median and 

 Paired Pins of Pish. By Edwin S. Goodrich, P.R.S., Pellow of 

 Merton College, Oxford. (With Plates 10—14) . . 333 



Preliminary Account of a New Organ in Peripianeta orientalis. 

 By Ruth M. Harrison, Lady Margaret Hall, Oxford. (With 

 Plate 15) . . . . . .377 



