435 



carious plants. Fungology has, of late years, progressed with 

 great rapidity, and a considerable demand lias arisen for a handy 

 and reliable work of reference. We are glad that such a work- 

 is now available ; still more so that it has been produced by 

 Mr. Massee, for assuredly no one is better qualified to undertake 

 this somewhat difficult task. Mr. Massee's name as the author 

 of a book is not only a guarantee of accuracy, but it leads us to 

 expect much in the matter of completeness and lucidity. In the 

 work now under consideration these expectations are fully justi- 

 fied. The value of the book from an educational standpoint is 

 greatly enhanced by the insertion of numerous references to works 

 treating of the particular branch of the subject dealt with in the 

 preceding section. The figures are well drawn, and the printed 

 matter is far more readable than one would think possible, 

 considering the technical nature of the subject under discussion. 

 We can cordially recommend this volume to any one desirous of 

 acquiring a knowledge of the fungi, especially of the obscure, but 

 highly important, microscopic forms. F. P. S. 



The Cambridge Natural History, vol. i. By Marcus Hartcg, 

 M.A., Igerna B. J. Sollas, B.Sc, S. J. Hickson, M.A. r 

 F.Pv.S., & E. W. MacBride, M.A., F.R.S. 6 x 8f in. 

 671 pages, with 296 figures in the text. London, 1906. 

 Macmillan & Co. Price 17s. net. 



Vol. i. of The Cambridge Natural History has at length 

 appeared, and fully maintains the high standard of excellence at- 

 tained by the several volumes which have already been published. 

 It consists of four parts, dealing respectively with (1) Protozoa, 

 (2) Porifera (Sponges), (3) Coelenterata and Ctenophora, and ( 1) 

 Echincdermata. The Protozoa are treated on to the extent of 

 162 pages, with 62 figures. Great prominence is given to the 

 structure and life-histories of certain species rather than the 



