The Primary Factors of Organic Evolution

By E. D. Cope. 121 illustrations. Pp. 550. Tables, bibliography and index. Cloth, net, $2.00. (10s.).

A comprehensive handbook of the Neo-Lamarckian theory of Evolution, drawing its main evidence from paleontology, as distinguished from œcology (Darwin) and embryology (Weismann). Discusses the “Energy of Evolution,” and lays special emphasis on the function of consciousness in organic development.

“Will stand as the most concise and complete exposition of the doctrines of the Neo-Lamarckian school hitherto published. A most valuable text-book for teachers and students.”—Science, N. Y.

“A work of unusual originality. No one can read the book without admiring the intimate knowledge of facts and the great power of generalization which it discloses.”—Prof. J. McK. Cattell.