128 THE SCOTTISH NATURALIST 



In this paper we have given the Scottish status, as it 

 is known at present, of the various races of which we have 

 treated. As will be seen, there is much work yet to be 

 done before their real status in this country is determined. 

 There are, of course, birds of which more than one race 

 has occurred in Scotland without there being a resident race 

 in our islands : to these we have not alluded, but a good 

 look out should be kept for them, as well as for other forms 

 of our breeding birds which have not yet occurred. 



BOOK NOTICE. 



The British Freshwater Rhizopoda and Heliozoa. By (the 

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

 by John Hopkinson, F.L.S., etc. Vol. III. London: The Ray 

 Society, 191 5. 



Works dealing fully, both as regards text and illustrations, with the 

 Protozoa, the true microscopic life, of these islands, can scarcely be said 

 to exist. It therefore affords us no little satisfaction to be able to 

 chronicle, with continued approval, the issue of a further instalment — 

 the third and as now arranged the last but one — of the Ray Society 

 Monograph of the British Freshwater Rhizopods. Notices of the first 

 and second volumes were given in the Ann. Scot. Nat. Hist, for 1906 

 and 1910. In the continuation of the work the Society has been 

 fortunate in securing the services of Mr Wailes, who is well-known as a 

 contributor, at first hand, to the literature of the group. The volume 

 now before us begins with a sketch of the life of James Cash, by whom 

 the first two were chiefly written. The systematic part of the work 

 is then continued and occupies 152 pages, beginning with the Euglyphina 

 and ending with the Amphistomina. The number of species described 

 is fifty-three, all of which are figured in the twenty-five fine plates (eight 

 coloured) and numerous illustrations in the text. 



