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NOTICES OF BOOKS. 



The British Freshwater Rhizopoda and Heliozoa. By 

 James Cash and George Herbert Wailes, F.L.S., assisted by 

 John Hopkinson, F.L.S., F.Z.S. 8J x 5|. Vol. I. The Rhizo- 

 poda, Pt. I. x + 150 + 32 pages, 16 plates. 8vo. 1905. 

 Vol. II. The Rhizopoda, Pt. II., xviii + 168 + 32 pages, 16 

 plates and frontispiece. 8vo. 1909. Vol. III. The Rhizopoda, 

 Pt. III., xxiv + 156 -f- 50 pages, 25 plates and frontispiece. 

 8vo. 1915. The Ray Society. Price 1 17s. 6d. net. 



It is with great pleasure we draw attention to the publication of 

 the third volume of the above work ; this completes the section 

 devoted to the British Freshwater Rhizopoda with the exception 

 of about forty species recorded since 1909, the date when the 

 second volume was issued. It is intended to include descriptions 

 and figures of these species in a fourth and final volume which will 

 also include the British Heliozoa. 



From a short history of this work at the commencement of the 

 second volume we learn that Mr. Cash passed away early in 1909 

 and did not see the completion of that volume. We must con- 

 gratulate the Secretary of the Ray Society in securing the services 

 of such a competent worker as Mr. G. H. Wailes to complete the 

 work left unfinished by its original author, the third volume 

 which has just been published being by him. Mr. Hopkinson has 

 provided a short memoir of James Cash. Before studying the 

 Rhizopoda he had devoted considerable attention to Bryology, 

 and his collection of drawings and specimens has been presented 

 to the Manchester Museum. When he first turned his attention 

 from the mosses to the rhizopods we do not know, but in 1891 he 

 read a paper before the Manchester Microscopical Society giving 

 the results of his investigations of the Rhizopoda of the Manchester 

 area in the same year. This paper added several species to the 

 British list, and seems to have revived an interest in the fauna 

 of these microscopic creatures. These volumes show how far 

 that interest has been carried and cannot fail to be an aid and 

 incentive to the microscopist in making further records of the 



