Geographical catalogue of the Mollusca found west of the Rocky Mountains, between latitudes 33 and 49 north, by J.G. Cooper.
Cooper, J. G. (James Graham),
Carpenter, Philip P. (Philip Pearsall),
Geological Survey of California.
Towne & Bacon,
At head of title: Geological Survey of California.
"The following list is based on that published by P.P. Carpenter, in his report to the British Association for the Advancement of Science, 1863."