INDEX 



271 



Distribution (See Early Records and Migra- 

 tions), 10-15. 



Dry Substance (See Water, percentage of) 



Early Records and Migrations, 10-15. 



Embryology, 30-33. 



Early stages, 31-33. 



Later stages, 33. 



Volumes of ova and embryos, 32. 



Eyes 



Age of opening, 19, N 191. 



Fat 



Fatty acids, 84. 



according to size, 85. 



according to sex, 85. 

 Total fat, 83. 



Feces 



Weight of, 59. 



Fecundity, 22. 



Influence of weight of mother, 23. 

 Influence of food conditions, 23. 



Fetus 



Crown-rump length, 64-65. 



Weight from 13th day of gestation, 64-65. 



Fibers — Nerve 



Number, 44-49. 



Diameter and area, 44, 45, 47, 48, 49. 



Formulas 



Catalogue of, 158-159. 

 Use of, 3. 



Fossil Remains 



Mus rattus, 10. 



Functions (See Physiology) 



Circulation, 61. 

 Digestion, 61. 

 Endocrine glands, 61, 62. 

 Muscle, nerve, 61. 

 Nervous system, 61. 

 Nutrition, 58, 59, 60. 



Functions (continued) 



■ Body temperature, 60, 61. 

 Reproduction, 61. 

 Respiration, 61. 

 Secretion, 61. 

 Special senses, 61. 



Ganglia (See Cells) 



Gestation 



Period of, 21, N 190. 

 Lengthening of, 22. 



Growth 



of entire body in weight on length: 



Birth to maturity, 65-69, N 198. 



Weight-length ratio, 72, N 202. 



Body length on body weight, 87, N 198. 



Body weight (Norway) on body weight 

 (Albino), N 200. 

 of entire body in weight on age : 



before birth, 31-33, 63-64. 



Birth to maturity, 65-72. 



Body weight, net, 74. 



under various external conditions, 63, 

 69. 

 of parts on body weight : 



Head, trunk, limbs, 73-75, N 195. 



Method of dissection, 73-74. 



Tail length on body length, 88, N 200. 

 of systems on body weight : 



Integument, 75, 76, N 196. 



Musculature, 75, 76, N 196. 



Skeleton (ligamentous), 75, 76, N 196. 



Skeleton (cartilaginous), 78. 



Viscera, 75, 76, N 196. 



Teeth, 37-39. 

 of organs on body length and weight : 



Methods of examination and graphs, 87- 

 102. 



Alimentary tract, 97. 



Blood (weight), 96. 



Brain, 90, N 200-201. 



Eyeballs, 91-92. 



Heart, 92-93. 



Hypophysis, 98-99. 



Kidneys. 92-93. 



Liver, 94. 



