36 CASE. [VoL. XIV. 
tion shown in those forms. The higher position of the radial 
process is a primitive character, and is well shown in Lytoloma 
(33) and in Chelonia girundica (34), as figured by Delfortrie. 
The vadius and w/na are apparently represented by the 
proximal ends of two bones that from their size could not 
have belonged to the posterior extremity. They are so crushed 
as to afford no distinctive characters. 
The scapulae show a broad angle between the scapula proper 
and the proscapular process. Both parts are strongly com- 
pressed, but show on their ends large areas for cartilaginous 
attachment. The neck of the glenoid portion is short in com- 
parison with existing members of the Chelonitdae. The pro- 
scapular process is much the shorter. The glenoid articular 
portion shows two faces: one for the coracoid and the other 
forming part of the glenoid cavity. The whole bone is very 
strongly built (Pl. VI, Fig. 13). 
The coracoids are long, slender bones, greatly thickened 
proximally where they articulate with the scapulae. Distally 
the shaft becomes flattened and very thin. Upon the upper 
surface there is a strong ridge running from the proximal end 
out into the flattened part of the shaft, where it disappears. 
This ridge is present in both Chelonta and Dermochelys, but is 
absent in 7halassochelys. In the latter form the whole bone 
is proportionately shorter and stouter (Pl. VI, Fig. 14). 
MEASUREMENTS. 
Length of most nearly complete bone . . . .405 meters 
Breadth qistaliende 29 sat. x5 pic eel kot omens MOISES 
The pubis has a very large and distally expanded ectopubis. 
It is much larger than the entopubis, and joins it at almost a 
right angle; in these respects it differs from the living sea 
turtles, where the two processes meet at an angle. The great- 
est axis of the ectopubis is in almost a line with the axis of 
the whole pubis. In the Pzzxzata these two meet at an angle. 
The entopubis joins the main body of the bone at almost a 
right angle by a very short and very broad neck, the anterior 
edge of which nearly reaches the edge of the acetabular face. 
The symphysial faces of the entoischia were nearly straight, 
