VII 
41. Examples of well-made bird skins 109 
42. Making up an owl skin ...... 1 1 1 
43. Determination of sex of birds by dissection 118 
44. Determining maturity of birds by the skull 119 
45. Shell of western painted turtle showing where cuts should be made to 
remove plastron or lower shell 143 
46. Methods of measuring fishes 153 
47. Operation of a seine 155 
48. A preserved collection of fishes 161 
49. Example of data sheet, freshwater specimens 164 
50. Example of data sheet, marine specimens 165 
51. Ligamentary skeleton of small mammal cleaned and dried for packing. . 172 
52. Hyoid bones of a dog, with cartilages of larynx 173 
53. Skeleton of porpoise, showing pelvic bones 174 
