Gallus Bankiva of India. 25 
costal grooves. (See Figs. 8 and 9). In G. bankiva, too, 
the sternum is highly pneumatic, and perforations for the 
admission of air into its substance are to be found in the 
little valleys among the facets for the hamapophyses upon 
the costal borders; and more extensive ones upon the far 
anterior aspect of its thoracic surface, or in the median, 
longitudinal furrow behind these latter. 
Not content with simple appearances, Darwin even went 
furth-r than I have hinted at in the last paragraph, for he 
made many proportional measurements, among depth of 
carina, length of bone, etc., etc., for our present subject as 
compared with the domesticated species ; and to those com- 
parisons [ will add here the differences in size of the bone 
in the adult male and female,—data which, for the end he 
had in view at the time, was not especially called for, and 
consequently not presented. These measurements I will 
offer in another ‘‘ Table,” after we have briefly considered 
the shoulder girdle. 
Let any one take the pains to compare the excellent. 
figure of Professor Parker’s drawing of the pectoral arch 
chosen from a common barn-yard fowl, and presented us 
in the ninth edition of the Encyclopedia Britannica, Vol. 
III., p. 720, with my drawing here given (Fig. 16), of the 
same parts for G. bankiva, and it will not be hard for him 
to admit that the bones of the wild fowl have a more deli- 
cate, graceful, and withal, elegant appearance, than those 
of the long domesticated species. And in truth so itis. In 
G. bankiva, the limbs of os furcula are slender and sub- 
cylindrical, move especially so in the hen where this bone 
is a very delicate structure, while its coracoidal ends are 
but moderately expanded in either sex. Chiefly, however, 
is to be noticed its large and sub-triangular hypocleidium, 
with its salient angles nicely rounded off, and its broader 
moiety, pendant. 
A coracoid possesses but a fairly tuberous head, with its 
summit hooked over mesiad, so that when the arch is ar- 
ticulated in situ, it largely shares in forming the ‘‘tendinal 
canal,” and allows the corresponding head of the os furcula 
to rest against it, but not the head of the scapula of the 
