MORPHOLOGY OF BAROSAURUS LENTUS. 
06 
RIBS 
A number of ribs, both cervical and dorsal, are present. They are large, but in 
their present condition show little distinction from those of Diplodocus or Bronto- 
saurus. None of the dorsal ribs is sufficiently complete to indicate the size of the chest 
cavity, which would be a point of considerable interest. 
M 
Figure 7. — Sternals of Barosaurus and Diplodocus camegiei. One-fourth natural size. Entire out- 
line, Barosaurus; dotted outline, Diplodocus, drawn from the photograph by Hatcher 1901, Figure 12. 
C, C, coracoid articulation; M, M', median articulation. 
STERNAL 
This bone (PI. VI, Fig. 1; Text Fig. 7) is in splendid condition except that its 
posterior end is somewhat eroded. It is an oval plate, one surface of which, the 
visceral, is concave, the other convex. The margin is somewhat irregular, but two 
articular areas are distinctly visible, one for its fellow on the inner margin, the other 
on the exterior border near the anterior end for the coracoid. The latter particularly 
