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The Free-Living 

 Unarmored Dinoflagellata 



KOFOID AND SWEZY 



S62 quarto pages; 12 colored plates and388 



figures in text. Paper, $12.50. 



Carriage extra, weight 7 lbs. 



A monumental work on these elusive organisms, 

 based on years of observation off the coast of Cal- 

 ifornia, in the Eastern Tropical Pacific, and in the 

 plankton traverse of the Northern and Western 

 Pacific and Indian oceans. 



The work sets forth a summary of present know- 

 ledge, makes clear the causes of discolored seas 

 and phosphorescence of ocean waters, and offers 

 new conceptions of the relationships of genera 

 within the group. 



The University of California Press 



Berkeley, California 19 East 47th Street, New York 



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GOULD. The Practitioners' Medical Dic- 

 tionary. 3d Edition Revised, 71,000 Words. 

 Cloth S4.00; With Thumbi Index S4.50. 

 Fabricoid $5.75; With Thumb Index $6.25. 

 By George M. Gould, A.M., M.D. 



GOULD. The Pocket Medical Dictionary. 



8th Edition Revised, 40,000 Words. Flex- 

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 $2.50. By George M. Gould, A.M., M.D. 



LANG. German-English Medical Diction- 

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 By Hugo Lang, B.A. (Munich). Revised 

 by Milton K. Meyers, M.D. (Philadel- 

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GORDON. French-English Medical Dic- 

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 don, M.D. (Paris). 



MARIE. EngUsh, French, Italian Medical 

 Vocabulary. Cloth $0.50. By Joseph 

 M.\rie (Philadelphia). 



P. BLAKISTON'S SON & CO., 

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The Cambridge University Press 



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THE MACMILLAN COMPANY 



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The Dynamical Theory of Gases. 



{Third Edition) 

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New, revised edition of this valuable work giving 

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Physics: The Elements. 



By Norman Robert Campbell 



A book of the fundamentals of physics; the nature, 

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The Theory of Functions of a Real Variable 

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By E. W. HoBSON 



Second edition, revised and enlarged. This new 

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Elements of the Mathematical Theory of 

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{_Fi/th Ediiioiz) 



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A study of electro-magnetic phenomena using the 

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A Manual of Seismology. 



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An outline of our present knowledge of Seismology, 



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Optical Theories. 



{^Second Editio^i) 

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