THE MAMMALIA 



IN THEIR RELATION TO PRIMEVAL TIMES. 



Ey Professor OSCAR SCHMIDT, 



Author of "The Doctrine of Descent and Darwinism." 



With 51 Woodcuts - - - - 12mo. Cloth, $1.50. 



l; Professor Schmidt was one of the best authorities on the subject which he 

 hap here treated with the knowledge derived from the studies of a liletime. We 

 use the past tense in speaking of him. because, since this book was prii.ted, its 

 accomplished author has died in the fullness of his powers. Although he pre- 

 pared it nominally for the use of advanced students, there are few if any pages 

 in his book which can not be readily understood by the ordinary reader. As 

 the title implies. Professor Schmidt has traced the Jinks of connection between 

 existing mammalia and those types of which are known to us only through the 

 dtsclosi.res of ecology. Pigs, camels, deer, horses, <lephai,ts, whales, sea's, 

 an:l apes, are a few of the clas e whose development, step by step, is thus care- 

 fully shown." New York Joutnal <f Commerce. 



"The author undertakes to tra:-e the history of mammalia through all the 

 stages of their geologico-zoologicsl devtlopment. It is unnecessary to ??>y that 

 his line of speculation takes him through mai;y misty labyrinths of thought. 

 While, however, the wriier d^als much with intricate hypotheses, he devotes 

 much space to the anatomical structure and other physical peculiarities of the 

 mammalia. This phase of bis woik gives it value apart from his theory." 

 New York Herald. 



"The work is an excellent and discriminating treatise upon one of the most 

 important branches of what is by far the most ptiipenopns scientific problems 

 of the day. It is marked l>y ripe t-cholarshin. keen intuition into the value and 

 relations of tacts, and by that c'earness whkh cn only result Irom a perfect 

 maetery of the subject on the part of the author.'" Boston Courier. 



"The author presents this ns furrisHng 'proofs of the ne< es^ty, the truth, 

 and the value of D irwinism as the foundation for the theory of descent,' within 

 the limited field des< nbed by the title. The work is supplemental to the au- 

 thor's tn-atisc on the 'Doctrine of Descent and Darwinism,' published in the 

 same series, but it is complete in itself, and includes the results of the latest 

 BcieLtitic research in this field." Boston Journal. 



" Professor Schmidt offers this work as ' a pugaestive i introduction to that 

 portion of the animal kingdom which stai d closest to anthropology.' He com- 

 pares in detail living mammalia with their paleontoloerical ancestors, paying 

 particular attention to the Pti nature of the teeth. Professor Schmidt asserts 

 .that man's teeth have decreased in number during Hs development, and are 

 likelv to deer ase in future. He believes that man will retain his present com- 

 plement of fingers and toes, but that the race will eventually become bald. The 

 work indicates minute-ness of research, and the subject-matter is ably pre- 

 sented." Albany Evening Journal. 



"As presenting the results of a considerab'e amount of original work the 

 volume should meet with a wide welcome at the hands of students of natural 

 history as a science of development. It doos not deal with (what human vanity 

 has chosen to calli the highest type? of the animal kingdom merely as subjects 

 for description, or even lor comparison with other forms, but considers them in 

 their relations to surrounding facts. This inv Ives a study of the changes in 

 organism due to the alteration of thoc-e conditions through the lapse of geologic 

 time." Chicago Tribune. 



u The history of the development of animals and tV>e history of the earth and 

 geosrranhy are made to confirm one another. The book is Illustrated with wood- 

 cut-, which will prove both interesting and instructive. It tells of living mam- 

 malia, pi-js. hippopotami, camels, deer, antelopes, oxen, rhinoceroses, horses, 

 elephants, sea-cows, whales, do^s, seals, insect-eaters, rodents, bats, semi apes, 

 apes and their ancestors, and the man of the future." Syracuse (N. Y.) Herald. 



New York : D. AITLETON & CO., 1, 3, & 5 Bond Street. 



