276 Proceedings of the Royal Society of Victoria. 



The dog family are here the most abnormal, and, among 

 domesticated dogs, although the larger varieties have a longer 

 gestation period than the smaller, the difference is not sufficient 

 to make the times accord with the law given. 



The ruminants form another group fairly consistent withm 

 itself ; but for them the constant n must be made equal to 80. 



The camel and giraffe families are left out of the following 

 list, the former for want of weights of individuals, the latter 

 because the gestation period is abnormally long. But of the 

 Cervid», Capridte, and Bovidje, the following are all the species 

 for which I can find both weights and gestation periods recorded. 



