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Weights and wing-lengths of some Trinidad birds

Published in Zoologica, in 1963, in volume 48, issue 1, pages 1-12

The reproductive behavior of the green sunfish, Lepomis cyanellus

Published in Zoologica, in 1963, in volume 48, issue 2, pages 13-24

Studies on the endocrine glands of the salmonoid fish, the ayu, Plecoglossus altivelis Temminck & Schlegel. V. Seasonal changes in the endocrines of the land-locked form, the koayu

Published in Zoologica, in 1963, in volume 48, issue 3, pages 25-32

The mammals of the Atlantica Ecological Research Station, Southern Rhodesia

Published in Zoologica, in 1963, in volume 48, issue 4, pages 33-48

The spawning and early development of the Atlantic parrot fish, Sparisoma rubripinne, with notes on other scarid and labrid fishes

Published in Zoologica, in 1963, in volume 48, issue 5, pages 49-60

Massive aggregations of large rays and sharks In and near Sarasota, Florida

Published in Zoologica, in 1963, in volume 48, issue 6, pages 61-64

Experimental studies of mimicry. 7. Relative palatability and Mullerian mimicry among neotropical butterflies of the subfamily Heliconiinae

Published in Zoologica, in 1963, in volume 48, issue 7, pages 65-84

A morphological study of imagine Heliconiinae (Lep.: Nymphalidae) with a consideration of the evolutionary relationships within the group

Published in Zoologica, in 1963, in volume 48, issue 8, pages 85-130

Spontaneous tuberculosis in fishes and in other cold-blooded vertebrates with special reference to Mycobacterium fortuitum Cruz from fish and human Lesions

Published in Zoologica, in 1963, in volume 48, issue 9, pages 131-144

Some genetic studies of Mullerian mimics in butterflies of the genus Heliconius

Published in Zoologica, in 1963, in volume 48, issue 10, pages 145-154

The electroretinogram of Heliconius erato (Lepidoptera) and its possible relation to established behavior patterns

Published in Zoologica, in 1963, in volume 48, issue 11, pages 155-165

The display of the blue-backed manakin, Chiroxiphia pareola, in Tobago, W.I

Published in Zoologica, in 1963, in volume 48, issue 12, pages 167-176