INDEX OF SUBJECTS. 



591 



Symmetry, Secondary, preliminary ac- 

 count, 475; principles, 

 479 



Scheme of relations of 

 parts in, 481 ; parts 

 repeated in, <ieometri- 

 callij peripheral to 

 points of origin, 557; 

 relation to Primary, 

 556, 557 



in Insects, 475; Crus- 

 tacea, 525 ; Verte- 

 brates, 553 ; Batra- 

 chia, 554; Triton, 555 

 Syndactylism, Man, 355, 356; Pithecia, 

 '356; Macacus, 356; Ox, 384387; 

 Pig, 387390 



Tadpole, extra spiracle in, 465 

 Timid ccenurus, transposition of genera- 

 tive organs, 170 ; case of six 

 suckers and segments pris- 

 matic, 565 



t'lliptica, asymmetrical arrange- 

 ment of genital pores, 170 

 xa<iinat<i, "intercalated" seg- 

 ments, 169; repetition of gene- 

 rative organs in proglottides, 

 169 ; two genital pores at the 

 same level, 170; consecutive 

 genital pores on same side, 

 170; bifurcation of chain, 566 

 xulium, changes in position and 

 alternate arrangement of geni- 

 tal pores, 170 

 tenuicullix, bifurcation of chain, 



566 



Tail-fin, division of, in Gold-fish, 451 

 Tail-spine, division of, Limtilu*, 456; 



Scorpion, 457 



Tapeworms, variations, 168 170; du- 

 plicity in, 565 



Tarsus, in some beetles with only four 

 joints appearing, 25 ; variation in 

 number of joints, Jilatta, 63, 415; 

 various numbers of joints in families 

 of Orthoptera, 415 

 Taurliina nirens, extra legs, 509 

 Ta.riden, teeth, '233 

 Tit. rug baccata, colour-variation, 47 

 Teal, Gargauey, division of digits, 392 

 Teeth, in undifferentiated series not 

 credited with individuality, 32 

 numerical Variation, 195 ; di- 

 vision of, 268; duplicate, 268; 

 statistics of Variation, 200, 

 209, 222, 235 



relation of upper to lower, 196 

 of Primates, 199208 ; Canidae, 

 2011222; Felidffi, 223226; 

 Viverridae, 227 231; Mus- 

 telidas, 231 235 : Pinnipedia, 

 235243 ; Ungulata, 243 

 246; Marsupialia, 246258; 



Selachians, 259 262 ; Jiucci- 

 inim, 262 



Teeth, terminal, least size of, 270; pre- 

 sence and absence of, 269; 

 Homosotic Variation in, 272 

 Recapitulation, 265 



Telephone, colour- variation, lividus, 43 

 division of pronotum, nigri- 



eans, 455 

 double (?) antenna, lividim, 



rot it ml i coll is, 551 

 double (?) leg, excavatun, 



fmcttx, 548 



extra legs, nisticus, 502 

 ' Telescope " Gold-fish, 453 

 Tell ina, sinistral variety, 54 

 Tenebrio granarius, double (?) leg, 548 

 Tentacles of Molluscs united, Helix 

 liixpida, 461; Limaxaijrea- 

 tis, 460 



repeated, Patella viilgata, 279 

 bifid, P1iysa acuta, 280 

 of Holothurians, 435 

 Tenthredo solitaria, extra legs, 502 

 if/nobilis, extra leg, 546 

 Terias, colour-variation, 52, 53 ; ane- 

 mone, hecabe, mandariiia, maricsii, 52 ; 

 betheseba, constantia,jaegeri, 53 

 Terminal members of Series, variation 



of, 79, 269, 271, 272, 407 

 teeth, 269, 272 ; digits, 407 

 Terrier, absence of preniolar, 215 

 Testes, variation in number in Hirudo, 



165, 166 

 Tetraceros, horns not as in 4-horned 



Sheep, 285 

 Ti'triicrinu.a, normally 4-rayed, 5-rayed 



and 3-rayed varieties, 437 

 Tetrops pncusta, double (?) leg, 545 

 Thoracopagous twins, transposition in, 



560 



Thumb, variation in number of phalan- 

 ges, 324 

 double, 349 

 Thylacimts, teeth, 255 

 Tin/Incite* pilosits, double (?) antenna, 



550 



Thyonidium, variation in number of or- 

 gans, 435 

 Tiarops poludiademata, specific character 



of, 426 

 Ti/iiitrelia tenebricosa, extra antennae, 



522 



Tomato, colour-variation, 47 

 Tonicia, variation in colour of scutes, 



308 



Tongue, division of, 451 

 Toxotits, extra eye, 280 

 Transposition of viscera, 560 

 Triasters, symmetry of, 430; found in 

 bilaterally symmetrical areas of seg- 

 menting ovum, 464 

 Trichoilex at/i-iucus, double (?) leg, 547 

 Tricliosurus vulpccuhi, premolars, 254 



