A Revision of the Genus “Portunus” (A. Milne-Edwards, Bell, etc.)

Abstract

1. The characters of the species of “Portunus” are redescribed in detail and comparatively.2. On the basis of the characters studied an attempt is made to determine the relationships of the constituent species, both within the genus and with allied genera, P. corrugatus and P. arcuatus, being regarded as the more primitive forms.3. P. marmoreus and P. holsatus are separated by a large number of characters.4. The status of various foreign, fossil and doubtful species is discussed.5. An account is given of the present state of knowledge regarding the distribution of the species.6. The synonymy of the generic name is considered at length.