..., but not in the very small invertebrate eyes. We describe a micro-ophthalmoscope that takes advantage of autofluorescent properties of invertebrate photoreceptors and test the device on the relatively well-understood eyes of jumping spiders and flies. In each case, our measurements confirmed previous findings...

...J. Ortega-Escobar; M. A. Ruiz The wolf spider Lycosa tarantula homes using path integration. The angular component of the displacement is measured using a polarized-light compass associated with the functioning of the anterior median eyes. However, how L. tarantula estimates the linear component...

... and the sequence of events in the pedicel during ingestion are discussed. * Present address: Department of Geology, University of Manchester, Manchester M13 9PL, UK. 20 01 1992 © 1992 by Company of Biologists 1992 feeding heart neurophysiology spiders sucking stomach tarantulas...