84 
ANATOMY AND PHYSIOLOGY 
OF THE PELVIS. 
The rudimentary pelvis is merely formed of two 
broad flat bones, which in this specimen are ossified at 
their symphysis ; they are wholly supported by the soft 
parts in the living animal, and appear like the os pubis 
of a gigantic pelvis, being rounded anteriorly and hol- 
lowed posteriorly; standing in an oblique position, on a 
line with the abdomen, each bone forms an irregular 
quadrilateral piece, about 1 foot 5 inches broad each 
way, and is in thickness 3 inches. 
OF THE RIBS. 
These are ten in number, which with the spine and 
sternum form a somewhat circular looking chest-"- which 
on account of the shortness of the neck, is situated 
close to the posterior part of the head. The ribs are in 
structure exceedingly hard and compact, and appear of 
small diameter when the size of the animal is com- 
pared,— they are nearly circular in form, having no 
hollow for the intercostal vessels,— they are slightly 
flattened at their sternal extremities. 
The first has but one articulating surface, that is to 
the transverse process of the first dorsal vertebra,— the 
second , third , and fourth have two ; that is, the posterior 
articulating surface of the second rib is articulated to 
the transverse process of the second dorsal vertebra, 
while its anterior articulating surface is articulated to 
the body of the first vertebra, and this same kind of 
articulation follows to the third and fourth ribs ; but 
