INDEX. 



113 



QiJADEATE bone, of Rattlesnake, 

 89 ; of Goose, 96. 



Radiate type of structure, 14. 



Rana {see Frog). 



Rattlesnake, form of, 89 ; scales 

 of, 89 ; rattle of, 89 ; eyes of, 

 89 ; tongue of, 89 ; jaws of, 89 ; 

 teeth of, 90 ; poison-gland of, 

 90 ; digestive system of, 91 ; 

 breathing-organs of, 91 ; heart 

 of, 91 ; nervous system of, 92 ; 

 skeleton of, 92 ; habits of, 92. 



Rays of the fins of Perch, 77. 



Heptilia, 88 ; characters of, 93. 



Respiratory sacs, of Leech, 26 ; of 

 Spider, 37 ; of Ascidla, 53. 



Rhizopoda, 6 ; characters of, 8. 



Ringed Worms (see Annelida) 



Sanguisuga (see Leech). 



Scales, of Perch, 77 ; of Rattle- 

 snake, 89. 



Scoledda, 21 ; characters of, 23. 



Sea-anemone (see Actinia). 



Sea-mat (see Flustra). 



Sea-squirts (see Asculia). 



Shell, of Terebratida, 54 ; of My a, 

 62, 63; of Whelk, 66; of Hya- 

 lea, 69. 



Siphons, of My a, 59 ; of Whelk, 

 66. 



Skeleton, of Perch, 79; of Frog, 

 87 ; of Rattlesnake, 92 ; of 

 Goose, 97; of Dog, 101. 



Soft rays of fins of Perch, 78. 



Spider, head and thorax of, 35 ; 

 legs of, 35 ; eyes of, 36 ; jaws 

 of, 37 ; abdomen of, 37 ; spin- 

 nerets of, 37 ; breathing-organs 

 of, 37 ; digestive system of, 38 ; 

 heart of, 38 ; nervous system 

 of, 38 ; habits of, 38. 



Spinnerets of Spider, 37. 



Spinous rays of fins of Perch, 78. 



Star-fish, form of, 17 ; skin of, 

 18 ; feet and water- vessels of, 

 19, 20 ; digestive system of, 20 ; 

 nervous system of, 20 ; respira- 

 tion of, 20 ; habits of, 20, 



Sub-kingdom?, 104. 

 Suckers of Culamary, 72. 

 Swim-bladder of Perch, 81. 

 Swimmerets of Lobster, 32. 



Tadpole of Frog, 83. 



Tail, of Lobster, 29 ; of Perch, 



78. 

 Teeth, of Perch, 80 ; of Frog, 85 ; 



of Rattlesnake, 90 ; of Dog, 100. 

 Tegenaria {see Spider). 

 Tentacles, of Hydra, 12 ; of Ac- 

 tinia, 14 ; of Flustra, 49 ; of 



Calamary, 73. 

 Terehratula, 54 ; shell of, 54 ; 



arms of, 55 ; digestive system 



of, 56 ; nervous system of, 56 ; 



habits of, 56. 

 Thorax, of Lobster, 29 ; of Spider, 



35; of Dragon-fly, 44. 

 Thread-cells, of Hydra, 13; of 



Actinia, 16. 

 Tongue, of Whelk, 67 ; oiHyalea, 



70; of Calamary, 73; of Frog, 



85 ; of Rattlesnake, 89. 

 Tunicata, 51 ; characters of, 53. 

 Tunics of Ascidia, 52. 



Univalves, 64. 

 Unpaired fins of Perch, 78. 

 Vraster {see Star-fish). 



Ventral fins of Perch, 78. 



Vertebra, 79. 



Vertehrata, characters of, 108. 



Waldheimia (see Terehratula). 

 Water- vessels-, of Star-fish, 20; of 



Wheel-animalcule, 22. 

 Wheel-animalcule, 21 ; cUiated 



wheel of, 21 ; cUgestive system 



of, 22 ; water-vessels of, 22 ; 



nervous system of, 22. 

 Whelk, 64 ; foot of, 65 ; siphon 



of, 66 ; shell of, 66 ; tongue of, 



67; digestive system of, 67; 



heart and breathiing-organs of, 



67 ; habits of, 68. 

 Wings of Dragon-fly, 44. 



