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Comparative Bnatom^. '' 



THE two handsome volumes before us form a complete and 

 very valuable Text-book of the Comparative Anatomy of 

 the Invertebrata, in compiling which the author has endea- 

 voured to do full justice to the numerous important results of the 

 research of the last decades. They contain, separated as far as 

 possible from the portions devoted to the main subject, the ele- 

 ments of Comparative Embryology, which will undoubtedly be 

 welcome to many students. The Comparative Anatomy of the 

 different animal races has been prefaced by short systematic 

 reviews, which will prove useful to the student or systematic zoo- 

 logist. The medical student will also find much valuable zoologi- 

 cal information. 



Vol. I. commences with a short introductory chapter on The 

 Cell, followed by a Systematic Review of the PROTOZOA. 

 Chapter II. treats of the METAZOA, and gives systematic reviews 

 of the ZooPHYTA or Ccelenterata — Class i, the Gastr^adte; 

 Class 2, PoRiFERA, or Sponges ; and Class 3, Cnidaria. Chapter 

 III., PLATODES. Chapter IV., VERMES. Chapter V., 

 ARTHROPODA-ARTICULATA— First Division, Crustacea; 

 Second Division, Tracheata ; Class i, Protracheata ; Class 2, 

 Antennata ; Class III., Arachnoidea or Chelicerota and 

 Tardigrada. 



Vol. II. treats of the MOLLUSCA, ECHINODERMATA, 

 and ENTEROPNEUSTA. 



With a view to giving our readers a better idea of the very 

 thorough manner in which the various subjects in these books are 

 treated, we shall, with the publishers' permission, make a few 

 extracts, and illustrate them with sortie of the blocks which they 

 have kindly placed at our disposal. We turn, therefore, to Chap. 



* " Text-Book of Comparative Anatomy." By Dr. Arnold Lang, Professor 

 of Zoology in the University of Zurich, formerly Ritter Professor of Phylogeny 

 in the University of Jena. With Preface to the English Translation by Prof. 

 Dr. Ernst Haeckel, F.R.S., Director of the Zoological Institute of Jena. 

 Translated into English by Henry M. Bernard, M.A.Cantab., and Matilda 

 Bernard. Parts I. and II., 8vo. Part I., pp. xviii. — 562 ; Part II., pp. xvi. — 

 618. (London: Macmillan and Co. 1891 and 1896.) Price 17/- each net. 



