D. Appleton & Co.'s New Publications. 



A Manual of the Anatomy of Invertebrated Ani- 

 mals. 



By Thomas H. Huxley, LL. D., F. R. S. 1 vol., 587 pages. Cloth, 



$2.75. 



"All students of Comparative Anatomy have felt the want of 6uch a manual as 

 this, which supplements Professor Huxley's 'Manual of Vertebrated Animals, 1 pub- 

 lished in 1371, and completes his undertaking to produce a treatise for students on this 

 extensive and complex branch of anatomical inquiry. Professor Huxley's plan is some- 

 what similar to what is known as the zoological method, which groups animals in 'nat- 

 ural orders,' according to a taxonomic system, and in which the anatomical characters 

 of the animals belonging to each of these orders are described and compared with each 

 other. This is unquestionably the most suitable plan, as it prevents confusing the reader 

 with a multitude of subordinate facts. The introduction and first and last chapters 

 are specially interesting to the general reader, who is here furnished with the most com- 

 pact account of the present aspect of the science of comparative anatomy in the English 

 language." — Nature. 



The Ancient Life-History of the Earth. 



A Comprehensive Outline of the Principles and Leading Facts of 



Palaeontological Science. By H. Alleyne Nicholson, M. D., etc., 



Professor of Natural History in the University of St. Andrews. 



With numerous Illustrations. 1 vol., small 8vo, 408 pages. Cloth, 



$2.00. 



Professor Nicholson gives us a compact and popularly-written introduction to a 

 very important department of science. His opening remarks on the " Principles of Pal- 

 eontology" sufficiently prepare those who maybe totally unacquainted with the funda- 

 mental facts of geological science for a profitable perusal of the succeeding chapters. 

 His work constitutes an able exposition and summary of the facts of palaeontology, suit- 

 ably arranged ; and he has wisely availed himself, to the fullest extent, of woodcut 

 illustrations in aid of his descriptions of the fossil forms. 



Elements of Geology, 



A Text-Book for Colleges and for the General Reader. By Joseph 



Le Conte, author of " Religion and Science," etc., and Professor 



of Geology and Natural History in the University of California 



1 vol., 8vo. 588 pages, with upward of 900 Illustrations. Cloth. 



Price, $4.00. 



" A good college text-book of geology has hitherto been wanting. There has been 

 no American work for high-class institutions which treats the subject so as to meet the 

 requirements of intelligent and scholarly people, who yet do not expect to become in- 

 dependent cultivators of geological science. This manifest gap has now been filled by 

 the publication of the work before us, and a careful examination of the volume con- 

 vinces us that it has been executed with great judgment with reference to the present 

 needs of higher education. Besides preparing a comprehensive text-book, suited to 

 present demands, Prof. Le Conte has given us a volume of great value as an exposition 

 of the subject, thoroughly up to date. The examples and applications of the work are 

 almost entirely derived from this country, so that it may be properly considered an 

 American geology. This is of advantage to the American student. A prime object 

 with the author has been to interest his readers. We can commend this work without 

 qualification to all who desire an intelligent acquaintance with geological science, as 

 fresh, lucid, full, authentic, the result of devoted study, and of long experience in teach- 

 ing. It is profusely and elegantly illustrated." — The Popular Science Montldy. 



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