GILMORE : NOTES ON OSTEOLOGY OF BAPTANODON BiB) 
MEASUREMENTS OF VERTEBR&Z OF NO. 919. 
Atlas and| : 
Cervicals | axis | 3d 4th 5th | 6th 7th | 8th 9th 10th | 11th | 
Greatest length of centrum in mm. 57 34 34 30 35 35 35 35 b — | = 
Greatest width of centrum in mm. 100 100 | 100 90 80 70 60 60 — = = 
Anterior dorsals | 1 2 Sal 4 5 6 g | 8 9 1@- || mi 
Greatest length of centrum in mm. — | 4) 45 | 45 43, 43 43. a) 3a | 48a | 42a | 
Greatest height of centruminmm.| 1006 | 1206) 110 | 1106; 110 | 110 | 101 | — | —~ | — Vires 
Greatest height with spinein mm.) 2106 | 245a) 245a) 2106) — | — _ —- | —}— ] = 
Posterior dorsals 1 2 3 4 5 6 7 8 9 10 11 
Greatest length of centrum in mm. 37 37 38 40 40 3 45 45 50 48 50 
Greatest height of centrum in mm. 100 104 | 104 | 104 | 104 | 106 | 106 | 102 99 99 99 
a@ = approximate, b = broken. 
Tue PrcroraAL GIRDLE. 
The elements of the pectoral girdle of No. 919 are finely preserved and entirely 
free from distortion. The scapule lack about half of their upper free ends and the 
coracoids their posterior borders. (See Plate XX XVIII.) These missing parts have 
been restored from the pectoral girdle of B. discus, No. &78 in the Carnegie Museum. 
The coracoids are broad subquadrangular bones which join one another medially 
by large elliptical facets. [The superior surfaces (Plate XX XVIII., Fig. 2) are flat- 
tened, although both elements are gently inclined toward the median line. The 
inferior surfaces are concave transversely and convex antero-posteriorly. The lateral 
borders are especially thickened forming a heavy articular face for the scapulee and 
humeri. This outer articular end is divided into two unequal faces meeting in an 
obtuse angle. The more anterior and smaller one of the two is for the scapula, and 
looks outward, forward, and obliquely upward. The larger and posterior surface 
forms the greater part of the glenoid cavity. This border is much straighter and 
longer antero-posteriorly than on the coracoids of B. discus. It’is very slightly 
conyex from above downward and is covered with tubercle-like eminences. This 
articular end is supported by a broad neck formed by a deep notch on the anterior 
margin. The anterior border from the inner notch thickens rapidly as it recedes 
posteriorly to form the intercoracoidal facet. (See Plate XX XVIII., Fig. 1.) 
The scapule are moderately long bones the upper halves being narrow with 
nearly parallel sides, the articular end is broadly expanded’ antero-posteriorly and 
thickened on their posterior margins where they enter into the formation of the 
glenoid cavity. The articulating face for the coracoid joins this border at an obtuse 
angle. 
The scapule extend outward, upward, and forward. Viewed longitudinally 
the inner surface is slightly concave as they curve up to lap over the side of the 
ribs. The articular ends on the dorsal surfaces are concave antero-posteriorly. 
