( 218 ) 
BuLLETIN no. 14, which together with nos. 12 and 13 will 
complete Vol. 4, has not yet been published. 
BULLETIN no. 15, with 106 pages, was issued February 
13, 1906. It contains the annual reports of the Director-in- 
Chief, Assistant Director, Curator of the Museums and Her- 
barium, Honorary Curator of the Economic Collections, Li- 
brarian, Head Gardener, Superintendent of Buildings and 
Grounds, Scientific Directors, Committee on patrons, fellows 
and members, and Treasurer. 
BuLieTin no. 16, a Descriptive Guide to the Grounds, 
Buildings and Collections, was issued December 18, 1906. 
It contains 88 pages of text and 17 plates. 
CONTRIBUTIONS 
ConTRIBUTIONS reprinted from various periodicals during 
the year are as follows: 
No. 74. The Polyporaceae of North America— XIII. The 
described species of Byerkandera, Trametes, and Coriolus, 
by William Alphonso Murrill. 
No. 75. Studies in North American Polygonaceae —I, 
li, by John K. Small. 
No. 76. Astragalus and its segregates as represented in 
Colorado, by Per Axel Rydberg. 
No. 77. The Delta of the Rio Colorado, by Daniel Trembly 
MacDougal. 
No. 78. The Incapacity of the Date Endosperm for Self- 
digestion, by Raymond H. Pond. 
No. 79. Affinities of certain Cretaceous plant remains 
commonly referred to the genera Dummara and Brachy- 
phyllum, by Arthur Hollick and Edward C. Jeffrey. 
No. 80, Heredity and the Origin of Species, by Daniel 
Trembly MacDougal. 
No. 81. Studies in Etiolation, by Augustine Dawson Selby. 
No. 82. Studies on the Rocky Mountain Flora— XVI, 
by Per Axel Rydberg. 
No. 83. The Hemlock Grove on the Banks of the Bronx 
River and what it signifies, by N. L. Britton. 
