In the field of helminthology, the life cycle of an organism not only brings to light the ontogeny of the individual, but also indicates its phylogenetic relationship in the general scheme of taxonomy. By means of the work ...

The Acanthocephala constitute a comparatively small group of parasitic worms which have been very much neglected from the taxonomic and life history standpoints. The proper location of the Acanthocephala among the invertebrates ...

The theory of kin selection is central to the understanding of social evolution. Recent theoretical work suggests a limitation on the action of kin selection in structured populations. The first such limit involves a ...