INDEX OF SUBJECTS. 



589 



Pujjinus, brachial plexus, 130 



Pug, breeds of, 57; teeth, 221 



Purpura lapillus, colour-variation, 48 



Putorius, teeth, 231, 234 



Pygcera anastomosis, extra wing, 284 



Pygidium, division of, in Melolontha, 456 



Pygomelian geese, 401 



Pyrameis cardui, aberrations of, 49, 52; 



var. kershawi, 49, 52; var. elymi, 50, -51 

 Pyrodes specia&w, extra legs, 496 

 Python, imperfect division of vertebra?, 



103, 105 



Eadial 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 

 Radulae of Buccinum, 262 

 Raiidffi, eye-spots, 302; extra fin, 540; 

 division of fin into lobes, 540; separa- 

 tion of fin from head, 540 

 Rana, vertebra, 124, 126; double foot, 

 540 ; spinal nerves,142 ; extra limbs, 554 

 Ranzania bertolonii, extra legs, 510 

 Raspberry, yellow variety, 47 

 Red, variations of, 44 — 48; as variation 



from blue, 44 

 Renal arteries, 277 

 Repetition of Parts, association of these 



jnhenomena, 21 

 Repetition, Linear, Bilateral or Radial, 

 distinctions between, 88 

 Units of, 556 

 Reptilia, vertebrae, 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 

 Rhizocrimts, 6-rayed specimen, 437 

 Rhizotrogus, extra legs, aestivalis, 510; 

 castaneus, 512 

 extra antenna?, cequinoc- 



tialis, 517 

 division of metasternal 

 plates, 456 

 Rhombus, pigmentation of blind side, 

 467—471 ; Icevis, 467, 468, 

 470; maximus, 467, 470 

 variations in scales, 468 

 Rhynchites germanicus, 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; Bradypodida?, 119; on 

 6th vertebra in Man, 108 



Ribs, variations in dorso-lumbar region, 

 Man, 109—116 ; Anthropoid Apes, 

 116— lis ; Bradypodidffi, 121; 

 Felis, 122; Cams, 122; dalictis, 

 123; Halicharus, 123 j eleven in 

 Siamese Twins, 560 



Rissa, variations of hallux in the genus 

 396, 397 



Roebuck, horns, 286 ; polydactylism, 

 374, 379 ; union of horns, 460 



Rubus idceus, colour-variation, 47 



Rupicapm tragus, horns, 286 



Rutela fasciata, extra legs, 512 



Sacculina, effect of, on segmentation of 



Carcinus and other Crabs, 95 

 St Bernard dog, duplicity of hallux in. 



401 

 Salinity, doubtful relation of variations 



of Crustacea to changes in, 100 

 Salmo fario, .-.•«/«//•, trutta, 58 

 Salmon, bulldog-headed variety, 58 ; axial 



duplicity, 563 

 Salmacina, double tail, 564 

 Salt lakes, Crustacea of, 96, 100 

 Samia cecropia, extra wing, 283 

 Sand-canals, repetition of, in Asterias, 



440 

 Saperda carcharias, extra antenna arising 



from head, 551 

 Sarcophilus, teeth, 255 

 Sarsia, Meristic Variation in, 424 ; with 

 six segments, 424 ; with five segments, 

 425 

 Saturnia carpini, repetition of eye-spots 

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

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

 colours of larva?, 306 

 Satyrus hyperanthus, eye-spots, 294 

 Sawfly, extra legs, 502, 546 

 Scales of Pilchard, 274 ; of Gasterosteus, 



276; of Snakes, 276 

 Scarites pyracmon, extra legs, 500 

 Scheme, shewing the relations of parts in 



Secondary Symmetry, 481 

 Scolopendra, number of segments, 94 

 Scorpion, double poison-spine, 457 ; 



double tail, 565 

 Scraptia fusca, extra antenna?, 523 

 Seals, variations in dentition, 235 

 Segmentation, metameric, not in kind 

 distinct from other forms 

 of Repetition, 28 ; two 

 ways by which a full seg- 

 mentation maj-have been 

 achieved in phylogenv, 

 86 

 of Arthropoda, variation 

 in, 91 ; imperfect in An- 

 nelids, 156 ; spiral in 

 Annelids, 157; variation 

 of in Cestoda, 168, 170 

 of mamma?, 191 

 of ovum, variations in, 463 



