Three Species of Australian Muricidae (Gastropoda) with Ancestors in the American Tertiary

Summary

In three different genus-groups of Muricidae there is a close relationship between fossil species found in the Tertiary of the western Atlantic and modern forms Living only off Australia. In two cases there are fossil Australian intermediate forms but in the third case the two species are unique. The species discussed are:

1.	Dermomurex (Viator) sexangulus, asteriscus, and antonius;
2.	Murexiella (Subpterynotus) textilis, antecedens, and tatei; and
3.	Dermomurex (Viator) sexangulus, asteriscus , and antonius;