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A study of the biology and behavior of the caterpillars, pupae and emerging butterflies of the subfamily Heliconiinae in Trinidad, West Indies. Part I. Some Aspects of larval behavior

Published in Zoologica, in 1961, in volume 46, issue 1, pages 1-24

Hybridization experiments in rhodeine fishes (Cyprinidae, Teleostei). An intergenetic hybrid between female Rhodeus ocellatus and male Acanthorhodeus atremius

Published in Zoologica, in 1961, in volume 46, issue 2, pages 25-26

The natural history of the oilbird, Steatornis caripensis, in Trinidad, W.I. Part 1. General behavior and breeding habits

Published in Zoologica, in 1961, in volume 46, issue 3, pages 27-48

Fatty degeneration, regenerative hyperplasia and neoplasia in the livers of rainbow trout, Salmo gairdneri

Published in Zoologica, in 1961, in volume 46, issue 4, pages 49-55

Morphological effects of low temperatures during the embryonic development of the garter snake, Thamnophis elegans

Published in Zoologica, in 1961, in volume 46, issue 5, pages 57-71

The orang-utan in Sarawak

Published in Zoologica, in 1961, in volume 46, issue 6, pages 73-82

Observations on the feeding, shedding and growth rates of captive snakes (Boidae)

Published in Zoologica, in 1961, in volume 46, issue 7, pages 83-87

The feeding mechanism of fiddler crabs, with ecological considerations of feeding adaptations

Published in Zoologica, in 1961, in volume 46, issue 8, pages 89-100

Hybridization experiments in rhodeine fishes (Cyprinidae, Teleostei). Intergeneric hybrids obtained from Acheilognathus lanceolata x Rhodeus amarus and Rhodeus amarus x Acheilognathus tabira

Published in Zoologica, in 1961, in volume 46, issue 9, pages 101-102

Some observations on the metamorphosis of the frog Rana curtipes Jerdon

Published in Zoologica, in 1961, in volume 46, issue 10, pages 103-104

A study of the biology and behavior of the caterpillars, pupae and emerging butterflies of the subfamily Heliconiinae in Trinidad, West Indies. Part II. Molting, and the behavior of pupae and emerging adults

Published in Zoologica, in 1961, in volume 46, issue 11, pages 105-124

Melanoma, renal thyroid tumor and reticulo-endothelial hyperplasia in a non-hybrid platyfish

Published in Zoologica, in 1961, in volume 46, issue 12, pages 125-131

Eastern Pacific Expeditions of the New York Zoological Society. XLV. Non-intertidal brachygnathous crabs from the West Coast of Tropical America. Part 2: Brachygnatha Brachyrhyncha

Published in Zoologica, in 1961, in volume 46, issue 13, pages 133-159

Nematodes and cestodes from the Australian monitor, Varanus gouldii

Published in Zoologica, in 1961, in volume 46, issue 14, pages 161-166

Urinary amino acids of non-human primates

Published in Zoologica, in 1961, in volume 46, issue 15, pages 167-180

The role of the thyroid in the development of platyfish

Published in Zoologica, in 1961, in volume 46, issue 16, pages 181-222