Accumulation of Sugars and Polysaccharide Accompanying an Inhibition of the Light Reaction in Photosynthesis

An inhibition of photosynthetic electron transport in susceptiblebarley following treatment with DDT is accompanied by an accumulationof fructose, glucose, and, to lesser extent, sucrose. Thereis an accompanying deposition of polysaccharide grains in thechloroplasts, and these are maintained even after a dark periodsufficiently long to deplete the carbohydrate reserves of untreatedsusceptible and treated and untreated resistant seedlings. Somepossible explanations of these observations are discussed.     

Species diversity and seasonal abundance in Charaxes butterflies (Nymphalidae)

Species diversity in Charaxes butterflies trapped in gardens at Freetown, Sierra Leone, is calculated by two different methods. There is little evidence of seasonal changes in diversity and in abundance.     

Nebela tuberculata comb. nov. (Arcellinida), its History and Ultrastructure

SYNOPSIS. The name Nebela tuberculata comb. nov. is proposed for the testate ameba formerly known as Difflugia tuberculata (Wallich, 1864) Archer, 1867. The generic reassignment is based upon the test construction material which is shown, by electronmicrographs and X-ray diffraction, to be autogenous regular and irregular silicious rods. A brief history of the animal is recounted utilizing works of several authors who have encountered the ameba over the last century.