VOLUME 51. 



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



1915. 70c. 



2. Bridoman, p. W. — Polymorphic Transformations of Solids under Pressure, pp. 



53-124. September, 1915. SI. 00. 



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



pp. 125-154. October 1915. 50c. 



4. Daly. 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. 



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



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



7. Jackson, Dunham. — Expansion Problems with Irregular Boundary Conditions. 



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



8. Kennellt, 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 Mavor, J. W. — On the Development of the Coral Agaricia fragilis Dana. pp. 

 483-511. 6 pU. 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. Fh.vncis. — 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 froiii the eastern coast of Canada, pp. 549-578. 

 3 pll. April, 1916. 70c. 



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



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



(Continued on page 2 of cover.) 



