A key work on evolution, based on snails in Hawaii. Gulick coined the term divergent evolution to describe the formation of new species due to geographical separation. The entire issue of this journal is devoted to Gulick's essay. A very good copy in the original wrappers. With a one-inch closed.....

First Edition. The paleontologist and curator at the American Museum of Natural History explains evolutionary theory for a non-scientific audience. 199 pages. First edition (first printing). A near fine copy in a very good dust jacket with a couple of tears to the top edge. This is a scientific association.....

First Edition. "Adaptive radiation—the rise of a diversity of ecological roles and attendant adaptations within a lineage—is one of the most important processes bridging ecology and evolution"—the back cover. Twenty-one essays. xvii, 621 pages. First edition. A near fine copy (minor bumping to the corners) in illustrated boards. This copy is.....

First Edition. Russell's last work, submitted for publication before his death but not published until eight years after. Unlike his earlier and influential books on evolution, this one has attracted relatively little attention, "despite both its technical discussion of adaptations in decapods (crabs, shrimp, etc.) and its different approach to.....

First Edition. 108 pages. Monographs in Population Biology, no. 9. First edition (first printing, hardcover issue). Near fine in a near fine dust jacket.

First Edition. 42 pages, plus 8 plates. 9-1/2 by 12 inches. Article I of The Bashford Dean Memorial Volume: Archaic Fishes. A memorial volume on Dean, who was an expert on fish and evolution, and a noted collector of armor. With a bibliography of Dean's 315 publications. First edition, first.....