Botany and Zoology. 97 



4. Economic Zoology, An Introductory Text-booh in Zoo- 

 logy, with special reference to its applications in Agriculture, 

 Commerce, and Medicine ; by Herbert Osborn. Pp. xv, 490, 

 with 269 figures. New York, 1908 (The Macmillan Company). 

 — A recent tendency to emphasize those features of a science 

 which have a practical hearing on human affairs finds expression 

 in this little text-hook, which differs from others of its class mainly 

 in the relative amount of attention devoted to those animals 

 which are of economic importance. The book has the usual sys- 

 tematic arrangement, and all the groups of the animal kingdom 

 are included, but where a choice of examples is possible the 

 species which concerns the human welfare is selected and its 

 significance discussed. The numerous illustrations are largely 

 selected from other books issued by the same publishing house, 

 and are in many cases not so well printed as in the works from 

 which they are taken. w. r. c. 



5. A Text-booh of the Principles of Animal Histology ; by 

 Ulric Daiilgren and William A. Kepner. Pp. xiii, 515. New 

 York 1908 ( The Macmillan Company). — In marked contrast to 

 practically all the text-books of histology in the English language, 

 which deal largely or exclusively with human or mammalian struc- 

 tures, this new book discusses the tissues of all classes of animals. 

 It is therefore possible to treat the subject much more broadly and 

 satisfactorily than has hitherto been done. The increased range of 

 material makes possible the incorporation of new and vastly im- 

 proved illustrations in place of the worn-out cuts of most other his- 

 tologies. The animal tissues are discussed in systematic order, 

 and the modifications of the tissues of the invertebrates find their 

 place beside the better known vertebrate structures. The orig- 

 inality of the work is most praiseworthy, and although some of 

 the illustrations are rather crude, they give at least a diagram- 

 matic illustration of the structures they are intended to represent, 

 and will be welcomed by all teachers of the subject. This book 

 will doubtless supplant in many cases the older works, adapted 

 chiefly to the needs of the student of medicine, which have 

 hitherto alone been available for scientific college courses. 



W. R. C. 



6. Archiv fur Zellforschung ; hrsg. von Richard Gold- 

 schmidt. Bd. ], Heft 1-4 ; pp. 622, pi. i-xxi. Leipzig, 1908 (Wil- 

 helm Englemann). — This newly established journal, devoted to the 

 study of cellular structure and phenomena of animals and plants, 

 takes its place at once among the highest type of biological publica- 

 tions. It is intended for the publication of the results of original 

 research, and is illustrated by the finest lithographic plates. 

 This first volume contains fifteen original contributions by some 

 of the most prominent cytologists of Europe, the subjects of their 

 investigations covering a wide range of cytological problems, 

 both in plants and animals. w. r. c. 



7. Ueber die Eibildung bei der Milbe Pediculopsis graminum; 

 von Exzio Reuter. — A reprint from the Festschrift fur Palmen 



Am. Jour. Sci.— Fourth Series, Vol. XXVII, No. 157.— January, 1909. 



7 



