Bowen, F. (1880). The latest form of the development theory--From the Memoirs of the American Academy, New Series, Vol. 5. Communicated March 27, April 10, and May 1, 1860. In F. Bowen, Gleanings from a literary life, 1838-1880 (pp. 199-231). New York, NY, : Charles Scribner's Sons.
http://dx.doi.org/10.1037/12765-010
The current chapter is reprinted from the Memoirs of the American Academy, New Series, Vol. V. Communicated March 27, April 10, and May 1, 1860. It is a familiar truth in palæontology, that the various races or species of animal and vegetable life which now tenant the earth, or have formerly tenanted it, did not originate all at once, but have been introduced at different and widely separated epochs. Those of which the remains are entombed in the earlier fossiliferous strata are now all, or nearly all, extinct; only a few among the Invertebrates have living representatives at the present day. And as the process of extinction was not sudden or sweeping, but gradual and protracted, so the new species appeared in succession, after long intervals of time, to fill the vacant places. "It appears," to adopt Sir C. Lyell's language, "that from the remotest periods, there has been ever a coming in of new organic forms, and an extinction of those which preexisted on the earth; some species having endured for a longer, others for a shorter time; while none have ever reappeared after once dying out." The species which are now in existence belong, geologically speaking, to comparatively recent times; indeed, none of the higher order among them are found in a fossil state at all. (PsycINFO Database Record (c) 2016 APA, all rights reserved)