CONTENTS OF VOL. XXXI. 
No. 1.— A rare Thalassinid and its larva. By Millett T. Thompson. 
(3 Plates.) March 27, 1903.1 
No. 2.— Proceedings of the Annual Meeting, May 6, 1903. 
Report of the Curator, Charles W. Johnson. .... 23 
Report of the Curator of the Teachers’ school of science, Prof. 
George H. Barton. ......... 25 
Report of the Secretary and Librarian, Glover M. Allen. . . 32 
Report of the Treasurer, Edward T. Bouve. ..... 38 
Officers for 1903-1904. 40 
List of Members.. .... 41 
By-Laws.55 
June 25, 1903. 
No. 3.— Systematic results of the study of North American land mam¬ 
mals during the years 1901 and 1902. By Gerrit S. Miller, Jr., 
and James A. G. Rehn. August 24, 1903. 61 
No. 4.— The metamorphoses of the hermit crab. By Millett T. 
Thompson. (7 Plates.) September 23, 1903. .... 147 
No. 5.— Observations on the cytology of Araiospora pulchra Thaxter. 
By Cyrus Ambrose King. (5 Plates.) November 25, 1903. . 211 
No. 6.— Contributions from the Gray herbarium of Harvard university. 
New series.— No. 27. By B. L. Robinson. February 19, 1904. 247 
No. 7.— Trichomes of the root in vascular Cryptogams and Angio- 
sperms. By Robert Greenleaf Leavitt, A. M. (4 Plates.) 
April 28, 1904. . 273 
No. 8.— Pycnogonida collected at Bermuda in the summer of 1903. By 
Leon J. Cole. (3 Plates.) July 29, 1904. 315 
No. 9. — North American Ustilagineae. By G. P. Clinton. October 24, 
1904. ... 329 
No. 10.—The anatomy and development of the terrestrial nemertean 
( Geonemertes agricola) of Bermuda. By Wesley R. Coe. (3 
Plates.) November 30,1904. 531 
