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An account is given of the winter nests of the hedgehog ( Erinaceus europaeus L.), and their importance in the life of this species. Nests were constructed for protection during hibernation, in sites chosen for the degree of support gained from surrounding objects. They were usually made mainly...
1. After a brief review of larval polyphenism with regard to colouration and behaviour of E. ello , experiments bearing on the influence of environmental factors upon the determination of the various color forms are described. 2. Larvae growing up singly develop into the green, the brown, or,...
1. Solenopsis fugax , a subterranean ant, lays odorous trails in the tunnels leading to the brood chambers of neighbouring ant species. The recruitment trail pheromone originates from the Dufour's gland. 2. In addition, when preying on the foreign brood, Solenopsis fugax discharges a highly...
Anemonia sulcata resorbs and accumulates tritiated l -amino acids dissolved in sea water in their natural concentrations (70–700 nmol/l). Resorption takes place mainly through the apical membrane of the ectoderm. Even after quite long periods of exposure autoradiography reveals that the amino...
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