[9] For the use of readers who do not understand Greek, we may state that the word _teleology_ is derived from the Greek word _telos_, Gen. _teleos_: end, purpose, aim; and means the "doctrine of design or a conformity to the end in view," or, as K. E. von Baer prefers and wishes to have introduced into scientific language, "the doctrine of the striving toward an end" (_Zielstrebigkeit_). It seems to be quite a superficial treatment of an idea on whose reception or rejection no less a thing than an entire view of the world with all its most important and deepest questions depends, when Dr. G. Seidlitz, in an essay on the success of Darwinism ("Ausland," 1874, No. 37), states incidentally that teleology is derived from the Greek [Greek: teleos] _perfect_. It is true that the Greek adjective for perfect is also derived from that noun, [Greek: telos], which has the same root as the German word _Ziel_, and there is even an Ionic form for that adjective which is [Greek: teleos], but the Attic form is [Greek: teleios]; and since modern languages, when a choice is allowed, do not derive their Greek foreign words from the Ionic, but from the Attic dialect, that word--were it really derived from that adjective and did it express "doctrine of perfection"--would have to be teleiology, or, in Latinized form, teliology. As far as we know, the word, since it was introduced into scientific language, has never been derived from any other root than from [Greek: telos], Gen. [Greek: teleos], _end_, and has never been used in any other sense than to express the doctrine of a purpose and end in the world. [10] Compare "History, Essays, and Orations of the 6th General Conference of the Evangelical Alliance," New York, Harper Bros., 1874, p. 264-271. [11] Compare D. F. Strauss, the most celebrated moral philosopher of Monism, in Sec. 74 of his "The Old Faith and the New." * * * * * Corrections made to printed original. p. 43. "the whole course of the zooelogical system" - "zoloogical" in original. p. 65. "corals, radiata, worms, mollusca, and crustacea" - "radita" in original. p. 73. "many portions of the skin" - "the the" (across line break) in original. p. 86. "forsakes us in the inquiry" - "inqury" in original. p. 112. "even philosophy can not take up the investigation" - "phi-osophy" (across line break) in original. p. 147. "the origin of self-consciousness" - "conciousness" in original. p. 265. "the origin of species through development" - "developement" in original. p. 297. "any other interpretation than to take them" - "then" in original. p. 343. "the Titan-like, rebellious Kainites" - "Titian" in original. Note 3. "The nearer a generation was" - "a a" (across line break) in original.