Anatomy &c. of the Coles. 247 
notched by two pairs of notches. It differs, however, in 
that the keel is hollowed along its anterior border, leaving 
a long spina externa; while in the Capitonide, as in so 
many Coraciiformes, the keel is continued forwards to a 
point corresponding with the level of the free end of the spina 
sterni. In the Colies, as among the majority of the Coracii- 
form types, the ribs articulate with the outer border of the 
anterior lateral process. There is no spina interna. ‘The 
coracoids do not cross one another, have long shafts broad at 
the base, and lack the procoracoid. 
In the great depth of the carina C. macrurus is remark- 
able among the Colies; while in this species also the posterior 
lateral and intermediate processes terminate in unusually large 
hastate expansions. 
The furcula is U-shaped and has a small hypocleideum. 
So far as I can make out, except in C. macrurus, it 18 
slender; but in the last-named species its rami are broad 
and twisted upon themselves. The free end of the furcula is 
expanded, and, being applied to the acromion of the scapula 
and the acrocoracoid, shuts in the foramen triosseum. 
The scapula is long, slender, and scimitar-shaped. 
The Pelvic Girdle. 
The pelvic girdle is of moderate length, and has the pre- 
acetabular region of the ilium very narrow, pointed, and 
applied, low down, to the base of the neural plate of the 
synsacrum: the postacetabular region is wide, the dorsal 
plane inflated, curiously transparent, and extremely broad, 
the transverse processes of the synsacrum having become 
suppressed. 
The ischium is narrow and produced backwards into a 
long downwardly directed pointed plate, which affords 
attachment to, but does not fuse with, the pubis. 
The pubis is long, slender, and rod-like, and produced 
backwards beyond the level of the ischium. 
The fovea lumbalis is small ; while the fovea ischiadica and 
pudendalis are confluent. 
