ANALYTICAL INDEX 



433 



ovum, 133 ; distinguished from multi- 

 ple births, 133 ; development of, 

 shown in Diagram III, 133, 134; 

 after-lives of, 134, 135 ; heredity and, 

 134, 138 n. ; predetermined in the 

 fertilized ovum, 137. 



Idiosyncrasies hereditary, 180. 



ilithyia, Byblia, intermediate f. 

 bred from wet, 341 ; wet f. conspicu- 

 ous, dry f. procryptic, 341; dry 

 warmth apparently the stimulus for 

 pupae to produce the dry f., 341. 



' Illegitimate ' unions of hetero- 

 styled plants, importance of, xxviii, 

 xxviii n. i, 90-2. 



Illogical Geology, Herbert 

 Spencer, 6. 



tllunaria,Selenia, seasonal changes 

 of, 311. 



ILLUSTRATIONS OF MIMICRY, 

 CHIEFLY FROM ORIENTAL LEPIDO- 



PTERA, X. 37O-6. 



Illustrations of the Relation- 

 ships existing amongst Natural 

 Objects, &c., Prof. J. O. Westwood, 



221. 



Imagination, Prichard on the effect 

 of parental, at the moment of con- 

 ception, 1 86 ; versus memory, 196-8 ; 

 necessity for the training of, in 

 youth, 199. 



'Immune', an incorrect term ap- 

 plied by Haase to models for 

 mimicry, 318; also adopted by Weis- 

 mann, 375. 



IMMUNITY, WARNING COLOURS 

 DO NOT IMPLY COMPLETE, X. 317, 



318. 



Imperforata in the Palaeozoic, 27. 



IMPORTANCE OF INSTINCTIVE 

 ATTITUDES AND MOVEMENTS FOR 

 MIMICRY, X. 363. 



Inborn : see ' inherent characters ', 

 141. 



Independence of mimicry and 

 affinity, 229-37, 336, 345 ; of size as 

 clear in Miillerian as in Batesian 

 mimicry, 363, 366. 



India, 70, 269, 317, 324, 342, 349, 

 363,371,372,373,376. 



Indirect evidence of birds attack- 

 ing butterflies, 270, 270 n. i, 281-3, 

 290-2, 325, 325 n. i. 



INDIRECTEVIDENCESUPPORTING 



MULLERIAN MIMICRY, X. 346,347. 

 INDIVIDUAL MODIFICATION TRA- 

 VERSES DIAGNOSIS, II. 73-5. 



INDIVIDUAL SEASONAL CHANGES, 

 X. 310. 



Individual subordinated to the 

 species, 316, 358. 



Individual variation a factor of 

 selection, 95-6 ; difference, Weis- 

 mann on causes of, 127, 128 ; colour 

 adjustment slow in pupae, 149, 150, 

 152-4, 305, 306 ; in a cocoon, 149 ; in 

 larvae, 152-4, 305-7 ; probable in 

 pupae of U. sambucaria t 150 n. 2 ; 

 colour adjustment rapid in certain 

 Vertebrata, Crustacea, and Cephalo- 

 poda, 300, 305, 313. 



Influences of locality, inconsistent 

 views of J. C. Prichard on, 191, 192. 



Inherent characters, definition of, 

 no, in, 122, 123, 141, 142; heredity 

 and, 96, 127, 178-85; somatogenic 

 characters less important than, 132-5 ; 

 somatogenic characters compared 

 with, 136 ; other terms used to ex- 

 press, no, in, 123, 141, 142; 

 Weismann's definition of, 142 ; 

 Goodrich's definition of, 142 ; clearly 

 distinguished as congenital or con- 

 nate from acquired characters by 

 J. C. Prichard (1826), 175, 179. 



Injuries to butterfly wings as if 

 caused by enemies, 270, 270 n. I, 

 281-3, 3 2 5 : see a l so 34- 



Innate, see inherent characters, 

 141. 



Innate tendencies, Lamarck's be- 

 lief in, 98. 



inornatci) Amblyornis, bower of, 



379- 



Insecta, D. Sharp, 257 n. I. 



Insectivora, moles of the, resem- 

 bled in other Mammalian Orders, 



312, 359- 



INSECTS, ESPECIALLY LEPIDO- 

 PTERA, PRE-EMINENTLY FITTED FOR 

 DISCUSSION ON SPECIES, II. 50-4. 



INSECTS, AND THE QUESTION 

 ' ARE ACQUIRED CHARACTERS 

 HEREDITARY?' Essay V, 139-72. 



INSECTS, VARIABLE PROTECTIVE 

 RESEMBLANCE IN, V. 152-4. 



INSECTS, THE INSTINCTS OF, V. 

 154-7: see also 117-19, 146, 147, 

 157-66. 



INSECTS, BEARING ON SUPPOSED 

 HEREDITARY TRANSMISSION OF 

 EXPERIENCE, OF MIMICRY, &c., IN, 

 V. 166-8. 



Insects in the Palaeozoic take 



Ff 



