Proceedings of the American Academy of Arts and Sciences. 



Vol. XLVIII. No. 13. — November, 1912. 



CONTRIBUTIONS FROM THE PHANEROGAMIC LABORATORIES 

 OF HARVARD UNIVERSITY. — Nos. 55-58. 



THE HISTORY, COMPARATIVE ANATOMY AND 

 EVOLUTION OF THE ARAUCARIOXYLON 



TYPE. 



By Edward C. Jeffrey. 



