Page 



37. Notes on East African Birds (chiefly nelfeting habits and 



stomach contents) collected 1915-1919. By Arthur 

 LovERiDGE, F.E.S., O.M.Z.S 837 



38. On the Myologj'^ and Classification of the Wombat, 



Koala, and Phalangers. By Charles F. Sonntag, 

 M.D., F.Z.S. (Anatomist to the Society). (Text- 

 figures 31-43.) 863 



39. Experimental Evidence that Commensalism may be 



beneficial to Crustacea. By Edward B. Poulton, 

 D.Sc, F.R.S., F.Z.S. , Hope Professor of Zoology and 

 Fellow of Jesus College in the University of Oxford. . 897 



40. Description of a New Lizard of the genus Ohalcides, 



from the Gambia, living in the Society's Gardens. 



By ,E. G. Boulenger, F.Z.S. (Curator of Reptiles) ... 899 



41. On the Parasitic JSTematoda collected from Mammalian 



Hosts which died in the Gardens of the Zoological 

 Society of London during the years 1919-1921 ; with 

 a description of three new Genera and three new 

 Species. By G. M. Vevers, M.R.C.S., L.R.C.P., 

 F.Z.S., Beit Memorial Research Fellow, and Assistant 

 in the Department of Helminthology, London School 

 of Tropical Medicine. (Text-figures 1-10.) 901 



42. On the Cestode Parasites from Mammalian Hosts which 



died in the Gardens of the Zoological Society of 

 Londonduringthe yea,rsl919-1921; with adescription 

 of a new Species of Cyclorchida. By G. M. Vevers, 

 M.R.C.S., L.R.C.P., F.Z.S., Beit Memorial Research 

 Fellow, and Assistant in the Department of Helmin- 

 thology, London School of Tropical Medicine. (Text- 

 figures 11 & 12.) 921 



43. On a further Collection of Mammals from the Liner 



Hebrides. By Ivor G. S. Montagu, F.Z.S. (Text- 

 figure 1.) 929 



44. Two new Indian Species of the little-known Genus 



Aidodrilus Bretscher of the Aquatic Oligocliysta 

 belonging to the Family Tubificidge. By H. R. 

 Mehra, M.Sc, Zoological Department, Benares Hindu 

 University. (From the .Zoological Laboratory, Cam- 

 bridge.) (Plates I.-III. ; Text-figures 1-9.) 943 



45. A Contribution to the Anatomv of a Hammerhea.d 



Shark {Zygcena malleus Shaw). By J. H. Lloyd, 

 M.Sc. (Birm.),F,Z.S., and Edith M. Sheppard, B.Sc. 

 (Wales), F.Z.S., Zoological Department, University 

 College, Cardiff. (Text-figures 1-7.) 971 



