[BS] Darwin's Fertilization of Orchids, p. 2; Lubbock's Scientific Lectures, p. 8.
[BT] Sir John Lubbock's Scientific Lectures, p. 3. Mr. Darwin refers to Fritz Müller's papers as reported in Botanische Zeitung, 1869-70. [Appendix IX.]
[BU] The Various Contrivances by which Orchids are fertilized by Insects, 2d ed. p. 293.
[BV] Fertilization, p. 5.
[BW] Fertilization, p. 12.
[BX] Fertilization, p. 102.
[BY] Ib. p. 113.
[BZ] Fertilization, p. 44.
[CA] Scientific Lectures, p. 31.
[CB] Fertilization, p. 2.