Sydney C. Cockerell, on Kropotkin's Life,
ii. 161
---- ---- ---- letter to Mr. Theo. D.A. Cockerell, on fertilisation,
ii. 49
---- ---- ---- letters to Charles Darwin:
on the Timor honeycomb, i. 143;
on Darwin's "Orchids," 143;
on theory of flight, 145;
on Spencer's "Social Statics," 150;
on Borneo exploration and his contribution to theory of man's origin,
152;
on his paper on Man and Natural Selection, 155;
on the Aru Islands, 161;
on a case of variation becoming hereditary, 162;
on the _Reader_, 165;
on dimorphism, 168;
suggesting "survival of the fittest" in preference to "natural
selection," 170;
on mimicry and glacier action, 176;
on expression, 180;
on "Creation by Law," 188, 192;
on superintendency of a Museum, 193;
on sterility of hybrids, 196;
on natural selection as producing sterility of hybrids, and pangenesis,
199;
on Trimen's paper at the Linnean Society, 201;
on selective sterility, 203, 205, 210;
on Darwin's "Cross Unions of Dimorphic Plants," 218;
on protection and sexual selection, 221, 222, 227;
on the dedication of "Malayan Travels," etc., 232;
on single variations, 234;
on colouring of caterpillars, 235;
on his "unscientific" opinions on Man, 243, 250, 255;
on wing-scales of butterflies, 244;
on Dr. Meyer, 248;
on "Descent of Man," 255, 259, 284;
recommending two remarkable books, 263;
on Mivart and Chauncey Wright's critique, 265;
on Darwin's answer to Mivart, 271;
on Dr.
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