226 



BIOLOGICAL LECTURES. 



TABLE IV. 



The Maximum and Minimum Measttrements. 



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

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

 entered. 



(c) The minimum length of head (29.8 mm.) and of tibio-tarsus (i.on 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. 



