Fossils

Pleistocene Bats from San Josecito Cave, Nuevo Leon, Mexico

Snails

Last Leaves from Dunk Island

Australasian Fossils: A Students' Manual of Palaeontology

Life's Dawn on Earth

Fossils: A Story of the Rocks and Their Record of Prehistoric Life Denver Museum of Natural History, Popular Series No. 3

Fossil Butterflies

Field Book of Common Rocks and Minerals For identifying the Rocks and Minerals of the United States and interpreting their Origins and Meanings

Dinosaurs, with Special Reference to the American Museum Collections

Animals of the Past

Geological Contemporaneity and Persistent Types of Life

The Romance of Natural History, Second Series

Walks and Talks in the Geological Field

Polar Exploration

A Short History of the Academy of Natural Sciences of Philadelphia

The Silver Caves

The Glaciers of the Alps

The Coal Measures Amphibia of North America

The Black Moose in Pennsylvania

Evolution