8 4 8 



INDEX. 



PAGE 



Raccoon .... 755 

 Radial symmetry . . . 35 

 Radials of a fin . . 543 



Radiolaria . . . .106 



Radius 465 



Radula of cuttlefish . . 389 

 ,, of gasteropods . . 398 

 ,, of snail . . . 370 

 Raja. See Skate. 

 Rana. See Frog. 



Rangifer . . . -735 

 Rat ..... 749 

 Ratitre ... . 662 



Rattlesnake . . . .612 



Ray 510 



Razor-shell .... 408 

 Recapitulation of ancestral 



history . . . 71, 7 2 

 Rectal gland . . . 522 

 Red coral . . . .164 

 Redia . .176 



Reducing division . . 6 1 



Reed ... -735 



Reindeer .... 735 

 Relative antiquity of 



Animals . . . 81-83 



Reproduction ... 52 

 of Amphibia . 587 

 ofAurelia. . 149 

 of Crustacea . 298 

 of Echinoderms 261 

 of Fishes . . 540 

 of Hydra . . 143 

 of Insects . . 332 

 of Mammals . 712 

 modes'of . . 54 

 of Rotifers . 234 

 of Sponges . 126 

 ofTaenia . .182 

 Reproductive system of 



Amphioxus . . 448 

 Anodonta . . 382 

 Arenicola . . 215 

 Ascidian . .431 

 Aurelia . .149 

 Balanoglossus . 418 

 bee ... 321 

 Chcetognatha . 233 

 cockroach . 315 



crayfish . . 277 



55 



55 



55 

 55 



55 

 55 



5 J 



55 



5 5 



55 



55 

 5) 

 55 

 5 5 

 5 5 

 55 



Reproductive system of 

 Crinoid 

 Crocodilia 

 Distomum . 

 earthworm . 

 frog . 

 haddock 

 Helix . 

 Hirudo 

 Holothurian . 

 Insects 

 Limulus 

 Lizards 

 Myxine 

 Nematoda 

 Nemerteans . 

 Ophiuroids . 

 Peripatus 

 Petromyzon . 

 pigeon . 

 rabbit . 

 scorpion 

 sea-urchin 

 Sepia . 

 skate . 

 spider . 

 starfish 

 Vertebrates , 



5 1 

 J 5 

 J 5 

 5 5 

 5 5 

 5 5 

 55 

 55 

 5! 

 ) 5 

 55 

 5) 

 55 

 55 

 55 

 5 5 

 55 

 5 5 

 5 5 

 55 



Reptilia 



5 ) 

 5 5 

 55 

 55 



55 



and Birds . 



development of . 



extinct 



relationships of . 

 Respiration in Animals . 

 Respiratory system of 

 Acarina 

 Amphioxus . 

 Anodonta 

 Arenicola 

 Ascidian 

 Balanoglossus 

 bee 



Cephalopoda 

 cockroach 

 crayfish 

 Crinoid 

 Crocodilia 

 Crustacea 

 frog . 

 haddock 



55 

 5 5 

 55 

 55 

 55 

 ) 5 

 J 5 

 J 5 

 55 

 ! 5 

 5 5 

 55 

 55 

 55 

 55 



1'AGR 



. 26O 



. 618 



. 174 



. 204 



. 578 



537 



372 



230 



256 

 332, 333 



. 605 



. 500 



. 191 



. 1 88 



. 249 



305 



505 

 . 647 

 . 691 



350 



253 



: .526 



354 

 . 246 



493 



590 



592 

 . 619 

 . 621 

 . 624 

 . 30 



356 

 ' * 43 



215 



. 427 



. 418 



. 320 



. 412 



. 276 



. 260 



. 618 



. 298 



576 



535 



