Fig. 68. Khynchops ulbicollis. 



Order XVIII. 



It is now generally recognized that the Gulls and Terns with 

 their allies, constituting the Order Gavice, are nearly related to 

 the Limicoke. The resemblance between the two groups is shown 

 in almost every detail of their anatomy, and it is even a question 

 whether they should not, as has been proposed by some writers, be 

 united into one order. Some, points of similarity are well known ; 

 for instance, the fact that the eggs of Gulls and Terns so closely 

 resemble those of Plovers that a not inconsiderable proportion of 

 the eggs sold in Europe as " Plovers' eggs " have been laid by Terns. 

 Even as regards the webbed feet, to which the Gavim owe their 

 inclusion in the Cm ierian Rotator es, it may be observed that some 

 Liuiicoline types, like the Avocet, have webs developed between 

 the toes to very nearly the same extent as Hydroclielidon amongst 

 the Terns. 



