CHAPTER III 
NEORNITHES CARINATAE 
BRIGADE I—-LEGION I (COLYMBOMORPHA:). ORDERS: ICHTHYORNITHES 
——COLYMBIFORMES—SPHENISCIFORMES—PROCELLARIIFORMES 
(C) THE Neornithes Carinatae, or birds which, with few excep- 
tions, have a keel to the sternum, include all the remaining 
members of the Class. .It 1s unnecessary to recapitulate the 
distinctions between these forms and the Ratitae, to be found on 
p- 26, but it may be well to reiterate that it is the sum of all 
the characters that constitutes the difference, and to point out that 
in one or more of the items several of the Carinatae agree with the 
members of the aforesaid group, though totally at variance with 
them in the aggregate. Claws on the manus are found on the 
pollex and index in certain of the Anseres, Cathartae, and Accipi- 
tres, and on the pollex alone in some Anseres, Accipitres, and 
Galli, with individual instances in other birds. ; 
Order I. ICHTHYORNITHES. 
Enough has already been said with regard to the position of the 
Order Ichthyornithes,«with its sole Family Ichthyornithidae ; but 
it remains to discuss the several 
members. Lcehthyornis victor, 
I. dispar, and the other species 
were small forms of about 
the size of a Partridge, with 
ey the habits and appearance, it 
Fic. 14.—Head of Ichthyornis. (From Geikie, is presumed, of Terns or Gulls.’ 
eee The head was extremely large 
eS = 
OW Ry 
AAA AtAag 
tNAAAASAL 
' This is very doubtful, as they show quite as many points of resemblance to 
other very different forms. 
