Download or read book Pictorial Guide to North American Trilobites written by Joseph J. Kchodl and published by . This book was released on 2019-02-08 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A beginners guide to the fascinating world of Trilobites. Once so common the Cambrian Period was called "The Age of Trilobites" A pictorial guide to some of the most common Trilobites found in North America and Canada.