MORPHOLOGY OF BAROSAURUS LENTUS. 
35 
would be 1,385 mm. A conservative estimate of at least a metre seems safe. (See 
also PL VII.) 
Compared with the pubis of Apatosaunis, that of Barosaurus is much lighter; it 
is in every way, except for its greater size, much more like that of Diplodocus. The 
proximal end is heavy, the pubic foramen oval, of good size, and running obliquely 
Figure 8. — Pubis of Barosaurus and Diplodocus carnegiei, superimposed. 
One-sixth natural size. Entire outline, Barosaurus; dotted outline, Diplo- 
docus, from a photograph by Hatcher 1901, Plate X, Figure I. A, A', 
ischiatic articulation. 
through the bone not far from its present posterior border. Below this thin, incomplete 
margin, there is a rugose articular surface which formed the ischiatic articulation. 
Externally, the bone has a fine curve, with a completely preserved rounded margin, 
which, except for the rugosity mentioned above, is thicker than that on the inner side 
of the bone. The visceral aspect is concave, the external one generally convex, as in the 
sternal. 
