586 



INDEX OF SUBJECTS. 



Melolontha vulgaris, double (?) leg, 545 

 hippocastani, extra antennae, 

 510, 557 

 Mephitis, teeth, 232 



Merism, 20; importance of, to Study of 

 Variation, 23 

 indirect bearing of, on the 

 magnitude of Variations, 

 25 

 Meristic Repetition, 20 ; kinship of parts 

 so repeated, 26 ; similar Variation of 

 parts in, 27, 310, 46-4; compared with 

 asexual reproduction, 34 

 Meristic Variation, distinguished from 

 Substantive Variation, 22 ; compared 

 with Hoinceotic Variation, 84 

 Metacarpals, development of lateral, in 

 Artiodactyla in correlation with syn- 

 dactylism of metacarpals III and IV, 

 383 

 Metameric Segmentation, not distin- 

 guishable from other forms of Repe- 

 tition, 28 ; errors derived from such 

 distinction, 30 

 Metasternal plates, division of, 456 

 Metazoa, comparison with Protozoa, 35 

 Metritis contractus, extra legs, 503 

 Middle Line, division by images in, 404, 



450 ; union of images in, 383, 458 

 Minnow, bulldog-headed specimen, 58 

 Minor Symmetry, 21, 88 ; Meristic Varia- 

 tion in, 311, 410 ; in manus and pes, 

 403 

 Molars, supernumerary, Simla, 200 ; 

 Troglodytes, 202; Gorilla, 

 203; Cynocephalus, 204; Ma- 

 cacus, 204 ; Cebus, 205 ; Ateles, 

 205 ; Mycetes, 207 ; Canidae, 

 217, 220 ; Felidae, 226 ; Her- 

 pestidae, 230; Mustelidae, 234; 

 Phocidse, 242; Ungulata, 245, 

 246; Dasyurus, 256; Bet- 

 tongia, 258 



special frequency in Anthro- 

 poid Apes, 200; in Lycalopex 

 group of Foxes, 217 

 absent, Sirnia, 200; Ateles, 207 ; 

 Pithecia, 208; Canidae, 219, 

 221; Felidae, 226; Herpes- 

 tidae, 231; Mustelidae, 235; 

 Phocidse, 243; Bettongia, 258 

 division of, Canis cancrivorns, 



219 ; Crossarchus, 230 

 Variation in form, Crossarchus, 



231 ; Dasyurus, 256 

 in Icticyon and Otocyon, 220 

 Monkevs, Old World, teeth, 204; New 



World, 205 

 Monodon, development of right tusk, 465 

 Monomorphism, 33 



Monotonia quadricollis, double (?) an- 

 tenna, 550 

 Moorhen, hairy varietv, 55; extra digits, 

 392 



Morpho, eye-spots, 296—299 



achillcs, 297; menelaus, 298; 

 montezuma, 297; psyche, 299 ; 

 sulkoicskii, 299 



Mouse, colour-variation, 44 ; with silky 

 hair, 55 ; black variety, 55 ; naked, 

 56 



Mugil capito, bulldog-headed, 58 



Mule, rarity of digital variation in, 360 ; 

 case of, 370 



Mullet, bulldog-headed varietj-, 58 



Multipolar cells, 430 



Mustelidae, teeth, 231, 235; premolars in 

 M. foina, martes, melanojnis, zibellina, 

 231 



Mycetes, teeth, 207, 208 



Mycomelic acid, relation to yellow 

 colouring matters, 73 



Mydaus, teeth, 232 



Myriapoda, variation in number of seg- 

 ments, 91, 93 



Myrmecobius, incisors, 247, 248 



Myxine, variations in number of gill- 

 sacs, 172 



Ncenia typica, extra wing, 284 

 Narcissus, Substantive and Meristic 

 Variation in, 23 ; colour- variation, 40 

 Narwhal, development of tusks, 465 

 Nasalis, teeth, 204 



Natural Selection, chief objection to 



theory of, 5 ; misrepresentations of 



the theory, 80 ; difficulty in connexion 



with regeneration, 420 



Navosoma, extra antennae, 521 



Nebria, double (?) antenna, 550; gyllen- 



halli, double (?) maxillary palp, 551 

 Nectarine, discontinuous variation in, 



59 

 Nereis, double tail, 564 

 Nerves, spinal, Birds, 129 — 135; Man, 



135; Apes, 138; Cat, 

 138; Dog, 140; Brady - 

 podidae, 141; Pipa, 

 141 

 attempt to homologize, 



32 

 variations, 129-145 

 correlation with verte- 

 brae, 145 

 relation to limbs, 143 

 Neural canal, division of, 451 

 Neuration of wings varying with eye- 



spots, 293 

 Nigidius, extra branch on antenna, 549 

 Nipples, supernumerary, on normal 

 breast, 184; on normal areola bifid, 

 184; on mammary lines, 186; in Pig, 

 190; in Dog, 189 

 Notidanidae, number of gills, 174 

 Nuclei, multipolar division, 430, 464; 



precocious division, 464 

 Nyctcreates procyonoides, teeth, 215 

 Nyctipithecus, teeth, 208 



