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On the Nest and Eggs of the Common Tern 
LIST OF PLATES BELONGING TO THIS PAPER. 
Plate II. Simple and complex nests ; a and h less elaborated, c and d more 
elaborated nests, 
Plate III. ff Clutch of three eggs ; b clutch of three eggs ; note agreement of size 
and shape with diversity of colour and mottling ; c noteworthy individual 
pigmentation in a one-egg clutch. 
Plate IV. Fig. a. - Common tern alighting on ground to show spread of wings. 
Fig. h. Unique clutch of four eggs in a more elaborate nest. 
Plate V. Connnon tern arranging her eggs and settling down to incubate. 
Plate VI. Common tern sitting; objects to giving a sitting to the photographer. 
LIST OF TABLES APPENDED. 
Table A. Organic Correlation. Mottling and Breadth. 
„ B. „ „ Mottling and Length. 
,, C. 7, „ Mottling and Index. 
,, D". „ ,, Value of Brown Ground Colour and Breadth. 
„ D''. „ „ „ Green „ „ „ 
„ E". „ „ „ Brown „ „ Length. 
„ E^ „ „ „ Green 
„ F^ ,, „ „ Brown „ „ Index. 
„ F". „ „ „ Green 
G^ „ „ „ Ground Colours and Mottling. 
G"". „ „ Length and Breadth. 
„ H. „ „ Longitudinal and Transverse Girths. 
I. „ „ Length and Longitudinal Girth. 
„ J. „ ,, Breadth „ „ 
„ K. „ „ Length and Index. 
„ L^ „ „ Breadth „ 
,, L^ „ „ Longitudinal Girth and Index. 
M. Direct Homotyposis. Ijengths. 
„ N. „ „ Breadths. 
„ O. „ „ Longitudinal Girths. 
^ „ P. „ „ Transverse Girths, 
„ Q. „ „ Indices. 
„ R. „ „ Mottlings. 
,, S. „ „ Values of Ground Colour. 
„ T. Cross-Homotyposis. Mottling and Value of Ground Colour. 
„ U. „ „ Length and Breadth. 
„ V. ,, „ Longitudinal and Transverse Girths. 
„ W. „ „ Length and Longitudinal Girth. 
X. „ „ Breadth 
