226 



BIOLOGICAL LECTURES. 



Table IV. 

 The Maximwn and Minimum Measurements. 



(a) The minimum length (152 mm.) occurs twice among the birds which perished : Nos. 40 and 52. 

 (i) The minimum weight (22.6 grams) occurs in each group : Nos. 53 and 60, and tlierefore is not 

 entered. 



(c) The minimum length of head (29.8 mm.) and of tibio-tarsus (i.oii inch) occurs twice among the 



surviving birds : Nos. 9 and 14, 41 and 51. 



(d) The maximum length of humerus (.780 inch) occurs in each group : Nos. 6 and 44, and therefore 



is not entered. 



Table V. 



Average Departures from Ideal Mean. 



