liv 



GENERAL INDEX 



DIVER. 



VOL. PAGE 



Bill strong, straight, pointed, the upper mandible 

 the longer, edges of each bending inwards ; nostrils gene- 

 rally linear, divided in the middle by a small cutaneous 

 appendage ; tongue long, pointed, serrated on each side 

 near the base ; throat toothed ; thighs placed far back- 

 ward; legs thin, flat, extended horizontally; feet four 

 toed, exterior toe the longest, the back one small, joined 

 to the interior by a thin membrane ; tail short. 



Great Northern Diver, or Loon, {Colymbus glacialis) ix 84 



SKIMMER. 



Bill greatly compressed, lower mandible truncate, 

 much longer than the upper; nostrils large, pervious; legs 

 weak ; feet four toed, back toe very small ; tail forked. 



Black Skimmer, or Sheerwater, {Bynchops nigra) vii 85 



TERNS. 



Bill subulate, straightish, pointed, a little compres- 

 sed and strong ; nostrils oblong ; tongue slender, point- 

 ed ; wings long ; tail generally forked. 



Great Tern, {Sterjia hirundo) . . . . vii 76 

 Lesser T. (S, minutd) ..... vii 80 

 Marsh (S. aranea) . . . . . viii 143 

 Short-tailed T, (S. plumbea) . . . . vii 83 

 Sooty T. {S, fuliginosa) viii 145 



