THE CAMBRIDGE 

 NATURAL HISTORY 



Edited by 

 Sir S. F. HARMER, K.B.E., Sc.D., F.R.S., 



AND 



Sir a. E. SHIPLEY, G.B.E., M.A., F.R.S. 



In Ten Volumes. Fully Illustrated. MediuTtiZvo. 21s.net each. 



library Edition. In Ten Volumes. Half Morocco. 

 In sets only. Medium 2>vo. ^{^15:15^. ne'. 



Vol. L Protozoa, by Marcus Hartog, M.A., D.Sc. ; 

 Porlfera (Sponges), by Igerna B. J. Sollas, B.Sc. ; 

 Coelenterata and Ctenophora, by S. J. Hickson, M.A., 

 F.R.S. ; Echinodermata, by E. W. MacBride, M.A., 

 F.R.S. 



Vol. II. Flatvvorms and Mesozoa, by F. W. Gamble, 

 D.Sc. ; Nemertines, by Miss L. Sheldon ; Threadworms 

 and Sagitta, by Sir A. E. Shipley, G.B.E, M.A, F.R.S.; 

 Rotifers, by Marcus Hartog, M.A., D.Sc. ; Polychaet 

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

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

 Gephyrea and Phoronis, by Sir A. E. Shipley, G.B.E. , 

 M.A., F.R.S. ; Polyzoa, by Sir S. F. Harmer, K.B E., 

 Sc.D., F.R.S. 



Vol. III. Molluscs, by the Rev. A. H. Cooke, M.A. ; 

 Brachiopods (Recent), by Sir A. E. Shipley, G.B.E., 

 M.A., F.R.S.; Brachiopods (Fossil), by F.R.C. Reed, M.A. 



LONDON: MACMH.LAN AND CO., Ltd. 



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