EXPLANATION OF THE FIGURES. 15 



Fio 



27. Muscular ribbons of the wiIlow-moth> (Cossics li(/niperda.) 



28. Vertebra of a cod-fish. 



29. Disposition of the muscles of the trout, {Salmo trutta.) 



30. Disposition of the muscles of an owl, (Strix bracJiyotis,) 



31. Jelly-fishes, {Stomobrachimn cruciatum, Hijpjpocrene BouffatmnUit.) 



32. Leech, showing the terminal cups. 



33. Portion of a Nereis, showing the gills as organs of motion. 

 34-43. Modifications of the fore-arm. 



34. Monkey. 35. Deer. 36. Tiger. 37. Whale. 38. Bat. 



39. Pigeon. 40. Turtle. 41. Sloth. 42. Mole. 43. Whale. 

 a. Leg of a beetle. 

 45. Leg of a lizard. 



46 Skeleton of a tiger. 



47 Cuttle-fish, {Loligo illecebrosa.) 



48 Sea-anemone, {Actinia mar g iimta ;) a, mouth; b, stomach; c, general 



cavity of the body. 



49. Planaria, showing the mouth, stomach, and its branches. 



50. Jaws, stomach, and intestine of a sea-urchin, {Echinus lividus.) 



51. Plan of the digestive organs of an insect. 



52. Plan of the digestive organs of a land-slug, {Teben7wphorus Carolini- 



e?isis. ) 



53. Globules of chyle. 



54. Portion of intestine, showing the lacteals of man, and their entrance 



into a vein. 



55. Jaws of an Echinoderm, {Echinarachnius parma.) 



56. Jaws of a sea-ur.chin, {Echi7ius granulatiis.) 



57. Beak of a cuttle-fish. 



58. Portion of the tongue of a mollusk, (Natica heros,) magnified. 



59. Jaws of an Annelide, (Nereis.) 



60. Trophi (organs for taking food) of a beetle. 



61. " of a bee. 



62. 63. " of a squash-bug. 



64. " of a butterfly. 



65. " of a. Rotifer, (Brachio7im.) 



66. Jaws of ditto, magnified. 



67. Skull of a tiger, showing the muscles for mastication. 



68. Head of a snapping-turtle, (Emgsaurtis serpentiiia.) 



69. Head of a Whale, showing the whalebone. 



70. Head of an ant-eater. 



71. Head of an alligator. 



72. Head of a skate-fish, (Mgliobatis,) showing the palate bone. 



73. Head of a monkey, showing the three different kinds of teeth. 



74. Teeth of an insectivorous animal, the mole. 



75. Teeth of a carnivorous animal, the tiger. 



76. Teeth cf a rodent. 



