112 



INDEX. 



nervous s^'stem of, 70 ; habitat 

 of, 70. 



Hydra, form of, 12 ; tentacles of, 

 12; thread-cells of, 13; bud- 

 ding of, 13 ; habits of, 14. 



Hijdrozoa, 11 ; characters of, 14. 



Incisor teeth of Dog, 100. 

 Infusoria, 9 ; why so called, 9 ; 



characters of, 11. 

 Ink-sac of Calamary, 74. 

 Insecia, 42 ; characters of, 46. 

 Interspinous bones of Perch, 



79. 



J.vws, of Leech, 25 ; of Lobster, 

 31 ; of Spider, 37 ; of Centi- 

 pede, 39 ; of Dragon-fly, 43 ; 

 of Calamary, 73 ; of Perch, 

 79; of Frog, 85; of Rattle- 

 snake, 89 ; of Goose, 96 ; of 

 Dog, 100. 



LamelUhraiichiala, 56 ; characters 

 of, 64. 



Lamp-shells, 54. 



Lateral line of Perch, 77. 



Leech, form of, 24 ; suckers of, 

 24 ; locomotion of, 24 ; jaws of, 

 25 ; digestive system of, 26 ; 

 breathing-organs of, 26 ; nerv- 

 ous system of, 26. 



Ligament of the shell of Mya, 

 62. 



Lithohius (see Centipede). 



Lobster, 27 ; structure of the 

 body of, 29 ; segments and ap- 

 pendages of, 29-33 ; digestive 

 systeiQ of, 33 ; gills of, 33, 34 ; 

 heart of, 33 ; nervous system 

 of, 34 ; habits of, 34. 



Loligo {see Calamary). 



Mammalia, 99 ; characters of, 



104. 

 Mammary glands, 104. 

 Mantle, of Terehratula, 54 ; of 



Mya, 57 ; of Hyalea, 70. 

 Metamorphosis of Dragon - fly, 



45, 46. 

 Molar teeth of Dog, 101. 



Molhisca, characters of, 107. 



Mya, 57 ; mantle of, 57, 58 ; ad- 

 ductor muscles of, 58 ; gills of, 

 59 ; digestive system of, 60 ; 

 respiratory process of, 60 ; shell 

 of, 62, 63 ; habits of, 63. 



Myriapoda, 39 ; characters of, 41. 



Nervous system, of Star-fish, 20 ; 

 of Wheel-animalcule, 22 ; of 

 Leech, 26 ; of Lobster, 34 ; of 

 Spider, 38 ; of Centipede, 41 ; 

 of Dragon-fly, 45 ; of Flustra, 

 SO; oi Ascidia, 53; of Terehrat- 

 ida, 56 ; of Mya, 60 ; of Wlielk, 

 67 ; of Calamary, 73 ; of Perch, 

 81 ; of Frog, 86 ; of Rattlesnake, 

 92 ; of Goose, 97 ; of Dog, 10-3. 



Nervures of the wings of Dragon- 

 fly, 44. 



Nettle-cells, of Hydra, 13 ; of 

 Actinia, 16. 



Nipping-claws of Lobster, 31. 



Operculum of Whelk, 66. 



Paired fins of Perch, 77. 



Paramoecium, 9 ; cilia of, 9 ; di- 

 gestive system of, 10 ; con- 

 tractile chamber of, 10. 



Pectoral fins of Perch, 78. 



Pen of Calamary, 75. 



Perca {see Perch). 



Perch, form of, 76 ; scales of, 77 ; 

 lateral line of, 77 ; fins of, 77, 

 78 ; skeleton of, 79 ; digestive 

 system of, 80 ; gills of, 80 ; 

 heart of, 81 ; respiratory pro- 

 cess of, 81 ; swim-bladder of, 

 81 ; nervous system and sense- 

 organs of, 81 ; habits of, 82. 



Phallusia (see Ascidia). 



Pisces, 76 ; characters of, 82. 



Poison-fangs, of Spider, 37 ; of 

 Centipede, 39 ; of Rattlesnake, 

 90. 



Poison-gland of Rattlesnake, 90. 



Poly:oa, 47 ; characters of, 50. 



Proteus- Animalcule (see A moeba). 



Protozoa, characters of, 105. 



Pteropoda, 69 ; characters of, 70. 



