INDEX 



467 



Reproduction and Sex Organs, 153-155 

 (T. 113). 

 Male, 124 (T. 146, 147, 149) 158: N. 377 



(T. 207) (C. 71). 

 Female, 146 (T. 146, 150) 158. 

 Placenta, 158. 



Weight of ovaries, 155-157 (C. 17, 18) 

 260 (T. 150): N. 377 (T. 207) (C. 72). 

 Weight of Tubes, 260 (T. 150). 

 Weight of Uterus, 260 (T. 150). 

 Weight of Vagina, 260 (T. 150). 



Respiration, 142 (T. 95, 96). 



Runts, 30. 



Salts, Distribution of, 314-316 

 (T. 168-170; 172-177). 



Scapula, 48. 



Semi-circular Canals, 139, 141 (T. 94). 



Senescence, 180. 



Sense Organs 



Dermal, 139. 



Ear, 119-121 (T. 81-82) 140. 



Semicircular canals, 139,141 (T 94). 

 Eye, 119 (T. 80). 



Weight of, 207 (T. 144) (C. 31). 

 Olfactory, 140. 

 Taste, 140. 



Serum {See Blood) 



Sex 



Ano-genital distance, 28 (T. 9). 

 Recognition of— in young, 28 (T. 9). 

 In relation to. 



Body length, 203. 



Tail length, 205. 



Weight of body, 29. 



Weight of brain, 206. 



Weight of spinal cord, 207. 



Weight of hypophysis, 218 (C. 43). 



Weight of pancreas, 216 (C. 40). 



Weight of suprarenals, 219 (C. 44). 



Sex Organs 



Male, 124 (T. 146, 147, 149) 158. 

 Female, 124 (T. 146, 150) 158, 260. 



Sexual Maturity, 17, 18, 37. 



Sexual Behavior, 155. 



Sex Ratio, 27: N. 337 (T. 184). 

 in later litters, 28. 

 according to season, 28. 



Skeleton {See also Bones) 

 List of bones, 43 (T. 13). 

 Cartilagenous skeleton, 184 (T. 126) 



(C. 23, 24) 301 (T. 160) (C. 51). 

 Ligamentous skeleton, 183 (T. 124, 125) 



299 (T. 158, 159) : N. 356 (T. 190) 



(C. 50). 



Skin {See Integument) 



Skull (^ee Skeleton: Cranium) 



Span of Life, 17: X. 336. 



Special Senses {See also Sense Organs) 

 Equilibrium, 139, 141 (T. 94). 

 Hearing, 140. 

 Sight, 140. 

 Smell, 140. 

 Taste, 140. 

 Touch, 139. 



Specific Gravity 



Blood, 61. 

 Brain, 76. 



Spermatogenesis, 37. 



Spinal Cord 



Cells, 105 (T. 67) (Fig. 11). 

 Composition, chemical, 320 (T. 178, 179) 



(C. 57). 

 Growth of, 206 (T. 144) (C. 30) : N. 360 



(T. 187) (C. 64). 

 Mitosis in, 76 (T. 43, 44). 

 Physiology, 139. 

 Water, percentage of, 308 (T. 157) (C. 55) : 



N. 378 (T. 210, 211). 



Still-born, 157. 



Submaxillaries, 217 (T. 147) (C. 41). 

 Superfecundation, 21. 

 Superfetation, 21. 



