Observations on the genus Unio, together with descriptions of new genera and species ... By Isaac Lea ...

v 2

Observations on the genus Unio, together with descriptions of new genera and species ... By Isaac Lea ...

v 5

New Pantodonta and Dinocerata from the Upper Paleocene of western Colorado / by Bryan Patterson --

v.6:no.24(1939)

Notes on the crayfishes in the United States National museum and the Museum of comparative zoölogy : with descriptions of new species and subspecies, to which is appended a catalogue of the known species and subspecies / by Walter Faxon.

v.40:no.8 (1914)