You are looking at the complete 2 volume set. Of the monumental work of John Van Denburgh on the Reptiles of the Western United Snakes. Number X of the Occasional Papers of the California Academy of Sciences. Volume II SNAKES and TURTLES. This is the cleanest condition set of this rare 100+ year old publication for sale, that I have ever seen.
There are 128 photographs with detailed locality data throughout. This is a must own for any serious herpetology library. See photos of spine and cover for condition details. I encourage potential buys to see other copies for sale on the net...... Feel free to reach out with any questions.