706 SCIENCE PROGRESS 



become a pressing problem that needs preparation in advance. The fishing 

 industry if properly revived might absorb many in an occupation profitable alike 

 to themselves and the country. Before any steps can be taken in these matters 

 or in the regulation of the fishery when formed, knowledge of not only the life- 

 history and movements of food fishes, but of all fish and their food, is required. 

 The migrations of fish are in the main determined by two factors : search for food 

 and a place to serve as a reproductive centre, i.e. a spawning ground. Hence 

 the usefulness of a book like the present volume at a time when there is need for 

 the information it contains being much more widespread than it has been 

 heretofore. 



The title of the book is in our opinion not quite well chosen, for it covers 

 more ground than is there indicated. Quite half the book, if not more, is devoted 

 to the geographical distribution of fish, an allied problem but one that could 

 easily be dealt with separately, and one that is in many cases only very remotely 

 connected with the actual migrations of fish. 



A large amount of material has been gathered together from many original 

 sources and is here rendered available to the general reader for the first time. 

 Throughout the book footnotes guide one to the original sources of many of the 

 observations referred to in the text, and in addition a short list of the most 

 important general papers on the subject-matter of each chapter is provided at its 

 end. Though the writing is not at all times easy to follow, mostly in the theoretical 

 parts, the descriptions and accounts are on the whole quite lucid. 



Note must be taken of the illustrations. Many useful maps giving the 

 distribution of various families or genera are provided in addition to sketches of 

 adult and larval stages of many species. The plates reach a high level throughout 

 and in some cases are excellent, and the printer has in them set a standard of 

 reproduction that we should like to see followed in other books. 



The need for such a book has already been indicated, and this, together with 

 the fact that it is the first attempt to deal with the subject in an exhaustive way 

 in English, should ensure it a wide circulation. It is useful, well printed, and 

 well arranged. 



C. H. O'D. 



Changes in Shade, Colour, and Pattern in Fishes, and their bearing on the 

 problems of adaptation and behavionr, with especial reference to the 

 flounders Paralichthys and Ancylopsetta. By S. O. Mast. " Bulletin 

 Bureau of Fisheries." Vol. XXXIV., 1914. Document No. 821. Issued 

 April 10, 1916. Price 40 cents. 



The Structure and Growth of the Scales of the Squeteague and the Pigfish 

 as indicative of life-history. By H. F. Taylor. " Bulletin Bureau of 

 Fisheries." Vol. XXXIV., 1914. Document No. 823. Issued September 

 23, 1916. Price 20 cents. 



The Fairport Fisheries Biological Station : its equipment, organisation, and 

 functions. By R. E. COKER. " Bulletin Bureau of Fisheries." Vol. 

 XXXIV., 1914. Document No. 829. Issued July 7, 1916. Price 20 cents. 



Notes on the Embryology and Larval Development of Five Species of 

 Teleostean Fishes. By A. Kuntz. " Bulletin Bureau of Fisheries." Vol. 

 XXXIV., 1914. Document No. 831. Issued August 3, 1916. Price 

 10 cents. 



From a number of " Documents " received in 1916 from the United States Bureau 

 of Fisheries the above four are selected as being of more than local interest, and 



