62 ANNALS OF SCOTTISH NATURAL HISTORY 



The work is being issued in monthly quarto parts at IDS. 6d. 

 Each part contains ten plates ; and it is probable that eighteen or 

 twenty-two parts will complete the work. 



THE CAMBRIDGE NATURAL HISTORY. Edited by S. F. Harmer, 

 M.A., and A. E. Shipley, M.A. Vol. II. WORMS, ROTIFERS, AND 

 POLYZOA. (London : Macmillan and Co., Ltd., 1896.) 



" The Cambridge Natural History" is making satisfactory progress, 

 since three important volumes have been issued in less than two 

 years. 



The volume under notice is the third issued, and it is equal to 

 its precursors, which have been favourably noticed in our pages, 

 in the excellence of treatment, scientific accuracy, and in its original 

 illustrations, of which there are 2 2 7 in the text. 



It treats of the following important, and in some cases difficult, 

 groups of invertebrates, chiefly by authors who are well known and 

 have made them a special study : Flat-worms and Mesozoa, by 

 F. W. Gamble ; Nemertines, by Miss L. Sheldon ; Thread-worms 

 and Sagitta, by A. E. Shipley, M.A. ; Rotifers, by Marcus Hartog, 

 M.A., D.Sc. ; Polychaet Worms, by W. Blaxland Benham, D.Sc., 

 M.A. ; Earthworms and Leeches, by F. E. Beddard, M.A., F.R.S. ; 

 Gephyrea and Phoronis, by A. E. Shipley, M.A. ; and Polyzoa, by 

 S. F. Harmer, M.A. 



There is only one fault to find with this volume, namely, the 

 want of a genera! introduction to the difficult groups treated of in 

 its pages. True, there is a tabulated " Scheme of Classification," 

 but this is not sufficient, and fails to convey an adequate idea of the 

 relationships and value of the different groups. 



We have pleasure in recommending the volume to those who 

 desire to have the best scientific work on the Worms, Rotifers, and 

 Polyzoa. Judging from the quality of the volumes issued, there is 

 no room for doubt that the Cambridge Natural History is destined 

 to become facile princeps among the Natural Histories, past and 

 present, written in our language. 



LIFE IN PONDS AND STREAMS. By W. Furneaux, F.R.G.S. 

 With 8 Coloured Plates and numerous illustrations in the text. 

 (London : Longmans, Green, and Co., 1896.) Price 125. 6d. 



This is the fourth volume of the popular " Out-door World 

 Library." It is a handsome and prettily illustrated volume ; is attract- 

 ively written ; and contains a great amount of useful and accurate 

 information regarding the numerous, very varied, and interesting 

 forms to be found in the ponds and streams of the British Islands. 



We have chapters devoted to Introductory matters ; Collecting 

 in Ponds and Streams ; the Use of the Microscope ; Preservation of 

 Objects; Aquaria and their Management ; the Lower Forms of Pond 

 Life ; Worms, Leeches and their Allies ; Freshwater Mollusca ; 

 Fresh-water Crustaceans and Spiders ; Aquatic Insects ; Fish for the 



