Xll 
LIST OF ILLUSTRATIONS 
FIGURE 
PAGE 
36. 
Bee’s Sting ....... 
- . • 
. 47 
37. 
Honey-bees Clustering at Swarming Time . 
• • • 
. 48 
38. 
Capturing a Swarm. 
. 49 
39. 
Hind Leg of Honey-bee .... 
. 50 
40. 
Tongue of Honey-bee .... 
. 51 
41. 
Model Apiary. 
. 51 
42. 
Worker Honey-bee Laden with Pollen 
. 52 
43. 
Thalessa Laying Eggs .... 
. 52 
44. 
Tremex 
. 53 
45. 
Common House-fly 
. 54 
46. 
Culex and Anopheles. 
. 55 
47. 
Eggs and Larvae of Culex .... 
. 55 
48. 
Crayfish, Showing Eggs .... 
. 60 
49. 
Molted Exoskeleton of Lobster 
. 61 
50. 
Organs of Crayfish. 
. 62 
51. 
Crayfish, Showing How Eggs Are Carried . 
63 
52. 
Soft-shell Crab .... 
. 64 
53. 
Pill Bug. 
. 64 
54. 
Cyclops. 
. 65 
55. 
Daddy-long-legs. 
. 65 
56. 
A Common Spider ..... 
. 66 
57. 
Tropical Spider. 
. 66 
58. 
Thousand-legged Worm and Centipede 
. 66 
59. 
Perch . 
. 68 
60. 
Sunfish 
. 69 
61. 
Brook Trout. 
. 70 
62. 
External Parts of a Bass .... 
. 71 
63. 
Scales of Fishes . 
. 71 
64. 
Gill of a Fish ...... 
. 73 
65. 
Eggs of the Land-locked Salmon 
. 76 
66. 
Young Fish Just at Hatching Stage 
. 78 
67. 
Young Fish Seventeen Days after Hatching 
. 78 
68. 
Grayfish . . . ... 
. 79 
69. 
Whiting. 
. 80 
70. 
Some Common Land Salamanders 
. 82 
71. 
Leopard Frog. 
. 83 
72. 
Diagram to Show the Organs of the Frog- 
. 86 
73. 
Kidneys of the Frog .... 
. 87 
74. 
Central Nervous System of Frog 
. 88 
75. 
Frog Eggs .... . 
. 90 
76. 
Diagram Illustrating Fertilization in Frog Egg 
91 
