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 Hirst, Stanley, F.Z.S. 



On some new or little-known Acari, mostly Parasitic 

 in Habit. (Text-figures 1-15.) 357 



Jones, E. Dukinfield, F.E.S., F.Z.S. 



Descriptions of New Moths from South-East Brazil. 

 (Plates I.-III.) 323 



Linde, Dr. Augusta Arnback-Christie-. 



On the Reproductive Organs of the Ascidian Kiiken- 

 thalia borealis Gottschaldt. (Text-figures 1-8.) 187 



Longstaff, Jane, F.L.S., F.G.S. 



Observations on the Habits of Cochlitoma zebra, var. 

 fulgurata (Pfeiffer), and Cochlitoma zebra, var. obesa 

 (Pfeiffer), in Confinement. (Plates I.-III.) 379 



Lucas, N. S., M.B., F.Z.S. (Pathologist to the Society). 



Report on the Deaths which occurred in the Zoological 

 Gardens during 1920 179 



Mallock, A., F.R.S., F.Z.S. 



Colour-production in relation to the Coloured Feathers 

 of Birds. (Text-figures 1-4.) 221 



Mitchell, Dr. P. Chalmers, C.B.E., F.R.S. (Secretary to 

 the Society). 



Report on the Additions to the Society's Menagerie 

 during the months of November and December, 1920 . . 183 



Report on the Additions to the Society's Menagerie 

 during the month of January, 1921 184 



Report on the Additions to the Society's Menagerie 

 during the month of February, 1921 442 



Exhibition of, and remarks upon, lantern-slides of a 

 Baby Chimpanzee born in the New York Zoological 

 Park , 443 



