VOLUME 51. 



1. Thaxter, Roland. — New Indo-Malayan Laboulbeniales. pp. 1-51. August. 



1915 70c. 

 ■>. Bridgman. P \V. — Polymorphic Transformations of Solids under Pressure, pp. 



53-124. September, 1915. $1.00. 



3. Warren, Charles H. — A Quantitative Study of Certain Perthitic Feldspars. 



pp 125-154. October 1915. 50c. 



4. Ualy, Reginald A. — The Glacial-Control Theory of Coral Reefs, pp. 155- 



251 November. 1915. $1.25. 



5. Wheeler. William Morton. — The Australian Honey-Ants of the Genus 



Leptomyrmex Mayr. November, 1915. pp. 253-286. 50c 

 ti. KoFoiD, Charles Atwood, and Swezy, Olive. — Mitosis and Multiple Fission 

 in Trichomonad Flagellates, pp. 287-379. 8 pJl. November, 1915. $1.50. 



7. Jackson, Dunham. — E.^pansion Problems with Irregular Boundary Conditions. 



pp. 381-417. November, 1915. 70c. 



8. Kennelly, a. E., and Affel, H. A. — The Mechanics of Telephone-Receiver 



Diaphragms, as Derived from their Motional-Impedance Circles, pp. 419- 

 482. November, 1915. $1.25. 

 9 Mayor, J. W. — On the Development of the Coral Agaricia fragilis Dana. pp. 

 483-511. 6 pll. December, 1915. 90c. 



10. Blake, S. F. — (I) Compositae new and transferred, chiefly Mexican; (II) 



Robinson, B. L. — New, reclassified, or otherwise noteworthy Spermato- 

 phytes; (III) Macbride, J. Francis. — Certain Borraginaceae new or trans- 

 ferred, pp. 513-548. ' January, 1916. 50c. 



11. Mavor, James W. — On the Life-History of Ceratomyxa acadiensis, a new 



species of Myxosporidia from the eastern coast of Canada, pp. 549-578. 

 3 pll. April, 1916. 70c. 



12. Bridgman, p. W. — Polymorphic Changes under Pressure of the Univalent 



Nitrates, pp. 579-625. April, 1916 70c. 



13. Verhoeff, F. H., Bell, Louis, and Walker, C. B. — The Pathological Effects ■ 



of Radiant Energy upon the Eye. pp. 627-818. (8 pis.) July, 1916. $1.50. 



(Continued on page 2 of cover.) 



