77 



A large portion of the book is original, but the results of the 

 labours of previous workers have been duly noticed. The 

 authors do not claim to have written an exhaustive work on 

 the subject, but they are certainly to be congratulated on having 

 produced a treatise which will long remain a standard work of 

 reference in connection with aquatic insects, and one which should 

 serve as a model for a long series of similar studies on other 

 forms. D. J. S. 



'Text-book of Zoology. Treated from a Biological Standpoint. 

 By Dr. Otto Schmeil. Translated from the German by R. 

 Kosenstock, M.A. Part III. Invertebrates. 9^ x 6| in., 

 viii 4- 187 pages, numerous illustrations. London, 1900 : 

 A. & C. Black. Price 3s. 6d. 



It has been the author's aim in this book to give much greater 

 -attention to biological details than is usually done in text-books 

 of zoology. For this purpose a number of species representa- 

 tive of orders or sub-orders (or even families in some cases) 

 Jiave been selected for special treatment in regard to life-history, 

 habitats, food, enemies, and such-like matters, while the other 

 forms mentioned have been more summarily dealt with. 

 Systematic and morphological details are necessarily, under the 

 circumstances, to a large extent ignored. The insects receive the 

 greatest amount of attention, about half the book being devoted 

 to them, while on the other hand some groups of animals, such as 

 Polyzoa, Rotatoria, Tardigrada, etc., have been omitted altogether, 

 and the microscopic forms generally are very briefly dealt with. 

 The net result is a book which can best be described as a cross 

 between a " Natural History " and an ordinary zoological text- 

 book. It should, however, be very valuable as a companion to 

 a systematic work on zoology, especially as it contains a large 

 number of excellent illustrations. D. J. S. 



Jn Nature's Workshop. By Grant Allen. 7| x 4| in., viii -f 

 240 pages ; 100 illustrations by Frederick Enock. London, 

 1901 : George Newnes, Ltd. Price 3s. Gd. 



Of the making of books intended to popularise the study of 

 Natural History there is indeed no end, nor for that matter do 

 -we wish to see an end, though some of the samples we could very 



