_Barnegat City_ (female).—First rib shortest and broadest, but
considerably broader at proximal end than at distal end. Head and
tubercle close together. The succeeding ribs increase in length and
decrease in breadth to the fifth or sixth. The third, fourth, and fifth
are expanded and flattened at distal end. Seventh, eighth, and ninth
successively shorter. Distance between head and tubercle greater on
second rib than on first, and on third is greater than on second. On the
third to sixth, inclusive, the distance is about equal. The tubercle is
scarcely distinguishable on the seventh rib, while on the eighth and
ninth it is lacking, these ribs joining the transverse processes by a
terminal facet only.
_Newport_ (male).—Similar to those of the Barnegat skeleton, but first
rib maintains nearly the same breadth throughout. Neck thicker than in
Barnegat skeleton. Seventh rib terminates proximally in a single large
rugose facet, which connects with a similar facet on side of centrum of
seventh thoracic vertebra.
_Charleston_ (female, jr.).—Similar to those of the Barnegat skeleton,
but a distinct tubercle on the seventh rib. Eighth and ninth ribs end
proximally in a transverse facet only, which is largest on the eighth.
Tenth rib (represented by a fragment) only half as broad as the preceding
ones and more nearly round in section.