INDEX OF SUBJECTS. 



.>:> 



Pujinus, brachial plexus, 130 



Pug, breeds of, 57; teeth, 221 



Purpura lapillus, colour-variation, 48 



Putorius, teeth, 231, 234 



Pygara anastomosis, extra wing, 284 



Pygidium, division of, in Melolontho, 456 



Pygoinelian geese, 401 



Pyrameis cardui, aberrations of, 49, 52 ; 



var. kershawi, 49, 52; var. <'l>/>ui, 50, -51 

 Pyrodes speeiosus, extra legs, 490 

 Python, imperfect division of vertebra?, 



103, 105 



Radial joints of Crinoids, 421 

 Radial Series, Meristic Variation in, 60 ; 

 evidence, 422; in Echinodermata, 432 

 Radii, variations in number, Holo- 

 thurioidea, 433 ; Crinoidea, 435 ; As- 

 teroidea, 439; Echinoidea, 441; Ophi- 

 uroidea, 433, 447 

 Radius, absence of, 360 

 Radula? of Buccinum, 262 

 Raiidre, eye-spots, 302: extra fin, 540; 

 division of fin into lobes, 540; separa- 

 tion of fin from head, 540 

 Rana, vertebrae, 124, 126; double foot, 

 540 ; spinal nerves, 142 ; extra limbs, 554 

 Ranzania bertolonii, extra legs, 510 

 Raspberry, yellow variet}', 47 

 Red, variations of, 44 — 48 ; as variation 



from blue, 44 

 Renal arteries, 277 

 Repetition of Parts, association of these 



phenomena, 21 

 Repetition, Linear, Bilateral or Radial, 

 distinctions between, 88 

 Units of, 556 

 Reptilia, vertebra?, 103, 123 

 Reversion, hypothesis made in order to 

 escape recognition of Discontinuity in 

 Variation, 76 

 Rhagium mordax, double (?) leg, 548 

 Rhea, brachial plexus, 130 

 Rhinoptera, teeth, 259 — 261, javanica, 



261, jussieui, 259 

 Rhizocrinus, 6-rayed specimen, 437 

 Rhizotrogus, extra legs, aestivalis, 510; 

 castanius, 512 

 extra antennae, aquinoc- 



tialis, 517 

 division of metasternal 

 plates, 456 

 Rhombus, pigmentation of blind side, 

 467—471 ; Usvis, 467, 468, 

 470; maximus, 467, 470 

 variations in scales, 468 

 RJupichites permanicus, double (?) an- 

 tenna, 550 

 Rhyttirhinus, supposed case of extra 



eye, 281 

 Ribs, division of, in Man, 105 



cervical, in Man, 108, 112, 115; in 

 Dog, 122; Bradypodids, 119: on 

 6th vertebra in Man, 108 



Ribs, variations in dorso-lumbar region, 

 Man, 109—116; Anthropoid Ap< s, 

 116— lis; Bradypodide, Vi\ ; 

 Felis, 122; Canis, 122; Galietis, 

 123; Halichams, 123; eleven in 



Siamese Twins. ."> t , « i 



Rissa, variations of hallux in the genus 



396, 397 

 Roebuck, horns, 286 ; polydactylism, 



374,379; union of horns, 160 

 Rubus idaus, colour-variation, 17 

 Rupicapra tni<itt.<, horns, 286 

 Rutela fasciata, extra Legs, 512 



Sacculina, effect of, on segmentation of 

 Carciniu and other Crabs, 93 



St Bernard dog, duplicity of hallux in. 

 401 



Salinity, doubtful relation of variations 

 of Crustacea to changes in, 100 



Salmo fario, salar, trutta, 58 



Salmon, bulldog-headed variety, 58; axial 



duplicity, :>f>:i 



Salmacina, double tail. 564 

 Salt lakes, Crustacea of. 96, LOO 

 Samia cecropia, extra wing, 28 

 Sand-canals, repetition of, in Aster 



440 

 Saperda carcharias, extra antenna ariai 



from head, 551 

 SarcophiluS) teeth, 255 

 Sarsia, Meristic Variation in. 424; with 



six segments, 424 ; with five Begments, 



425 

 Saturnia carpini, repetition ofeye-8] 



in wings, 26; extra wing. 282; varia- 

 tion of eye-spots, 289, 301, 302; 



colours of Larva, 306 

 Satyrus hyperanthus, eye-spots, 294 

 Sawfiy, extra legs, 502, 546 

 Scales of Pilchard, 271; of GasUi 



276; of Snakes, 276 

 Scarites pyraemon, extra legs, 500 

 « Scheme, shewing the relations ^i parts in 



Secondary Symmetry, 1M 

 Scolopendra, numlx r of w jm< nts. 94 

 Scorpion, double poison-spine, r~ 



double tail, 565 

 Saraptia fusca, extra antenna?, 523 

 Is, variations in dentition. 235 

 Segmentation, metameric, not in 1. 

 distinol from other foi i 

 of Repetition, 28; two 

 way- by which a full s. 



mentation mayhavi l>< . □ 

 achieved in phyiogeny, 



of Axthropoda, variation 



in. 91 ; impi if. ct in An- 

 nelids. L56 : spiral in 

 Annelids, L57 : variation 

 of in Cestoda, L68, 17" 



of mamma . I'M 



of ovum, variations in. , 



