4 MARY L. WALKER ON THE FORM OF 
The Flamingo’s quadrate is in all important respects totally different from that 
of the Anserine birds. The two capitula are well apart: the internal one is small, 
and projects slightly backwards, the external descends on its outer side to an 
imperfectly developed accessory head (h’). The anterior process is large, broad, and 
curved upwards. The pterygoid condyle is well-developed (though not excep- 
tionally so), and is quite separate from the anterior mandibular condyle. It rises 
somewhat abruptly from the surface of the bone, and does not project forwards, as 
is more usual with it. The quadrato-jugal cup is deeply sunken, but its margins 
are not raised above the surface of the bone. The anterior condyle is large, and 
possesses a well-marked lateral trochlea. 
I1].—PELARGOMORPH®. 
We have examined and figured the quadrates of the Heron, Stork, and This, 
as examples of the three divisions of the Pelargomorphee—the Herodiz, Pelargi, and 
Hemiglottides of Nitzsch. 
In all of these, the two capitula are perfectly separate, and there are indications 
of an accessory head, especially in the Ibis and Heron. In all, the anterior process 
is large; the quadrato-jugal cup is deep, and its margins raised; the pterygoid 
condyle is well-marked and large ; and the mandibular articulation is very complex. 
In the Heron (and Egret) the anterior process is exceptionally large and long, 
Fig. 5. ARDEA CINEREA, 
with blunt rounded extremity. The pterygoid condyle is also abnormally large. 
The quadrato-jugal cup is rather far forward, near the base of the anterior process. 
The posterior portion of the mandibular articulation has its two condyles far apart ; 
the anterior portion is also double, and bears on its side a small accessory 
trochlea (i7.t.). 
In the Stork the anterior process is very broad, but not so long as in the 
Fig. 6. CICONIA ALBA. 
