HONEY BEE, recognition of impending calamity by, 90; consternation and dismay manifested by, 90; remarkable engineering feat by, 91; joy evinced by, 91; grief shown by, 91, 92; Huber's experiment demonstrating reason in, 178. HORSE, love of offspring in the, 143; seeking man's aid when in trouble, 144; self-medication by, 220. HOUND, death-feigning by, 212. HUMMING-BIRD, decorative instinct in, 128. HYDRA, water-louse feeding on the buds of, 52. HYDROZOA, nerve-tissue in, 41. HYMENOPTERA, recognition of kindred in social, 69. I ICHNEUMON, method of ovipositing in the bodies of caterpillars used by, 104. INSTINCT, definition of, 147, 148. J JAY, parental love in the, 142; battle between cat and, 143. JELLY-FISH, anatomy, physiology, and psychology of, 4; nerve-ring in nectocalyx of, 5; "eyes" of, 5; manubrium or "handle" of, 5; sensitiveness of nervous system in, 5; pulsing of nectocalyx in, 5; intoxicated, 15; light sought by, 15; effect of the excision of the marginal bodies of, 52; conscious determination in, 52; effect of alcohol on, 219. K KATYDID, color-changing function in, 191, 192. L LAND TERRAPIN, memory of locality in, 65; homing sense in, 65; author's experiments with, 65. LASIUS FLAVUS, author's experiments with, 67; slow in recognizing kin, 67; ants of the same species disinter buried, 101. LASIUS NIGER, memory of kindred in, 66. LEPIDOPTERA, organs of hearing in, 35. LETISIMULATION, definition of, 202; origin of, 206. LIMPET, homing sense in, 194; Romanes on the homing sense in, 195. LIOTHE, fowls cleaned by, 129. LIZARD, Ada Sterling's account of Kate Field's music-loving, 119; fondness for music in the tree, 119; Chilhowie "singing," 120; author's experiment with the piccolo on, 120. LOBSTER, love of offspring in the, 137; battle between monkey and gravid, 137. LOCUST, love of cleanliness in, 130; diamond mistaken for dewdrop by, 131; carnivorous tastes in the, 131; description of the toilet of a, 132. LYCOSA, love of music in, 108; tameness of, 110. M MAMMOTH CAVE, eyeless spider of, 11; eyeless fish of, 11; homing sense in the beetles of, 196. MANDRIL, a revengeful, 95. MEDUSA, intoxicated, 15. MELANOPLUS, reënforcing auditory ganglia of, 32. MEMORY, its discussion under four heads, 60. MIMOSA PUDICA, death-feigning by, 208. MIMOSA STRIGILOSA, death-feigning by, 208. MIND, definition of, 1. MOLE, degeneration of sight organs in, 10. MONERON, non-differentiation of nerve-cells in, 3; nervoid elements in, 3. MONKEY, author chosen as a friend by, 82; a laughing, 89; sorrow and reproach manifested by, 97; faculty of computing in the, 177; use of hammer by a, 222. MORPHOLOGY, its correlation with physiology, 2.