1. The vertical lines form the divisions for the whole period of the moult for the rcmiges, consisting of 



28 weeks. 



2. The honzontal bars, situated between any multiple of vertical lines, represent the respective remiges, whose 



ordinal number, in Koman figures, is placed in the lefthand-side column, as counted from the wrist- 

 joint. 



3. The letters to the right side of the table denote the order in which they moult, by plain letters, and 



alphabetically arranged for the metacarpo-digital — with one or more dashes (thus, ', ", '") for the 

 cubital portion of the wing, and also in their synchronizing order of moult with that of the hand-portion. 

 The darts on the right side of these letters are indicative of the direction of their moult for the groups 

 of which these remiges form an integral part. (See also Plates.) 



4. Top line : names of months for the period during which the perennial moult of the flight-feathers proceeds 



in Gymnorhina tibicen. 



5. The numbers entered on the second line are the dates of those months on which the specimens were 



received and examined. 



6. The cyphers on the third line, in addition to the number of weeks which each particular quill requires for 



its development (collective time for the species) from its first appearance to its full growth, also serve for 

 comparing chronologically any two or more quills between the metacarpo-digital and the cubital portion 

 of the wing, or inter se. 



