10 



E. C. CASE 



a few of the phalanges only being lost. Unfortunately the 

 bones were not all preserved in position, so that it is impossible 

 to give the position of all the elements with certainty ; the 

 bones of uncertain position are those marked carpals 3, 4 and 5, 

 and centrale and digits 3, 4 and 5. The other bones and digits 

 I and 2 are in the position in which they 

 were found, which is seemingly the correct 

 one. Most notable is the small size of 

 the first digit and its possible wide diver- 

 sion from the other digits in life. It lies 

 attached to the side of the metacarpal of 

 the second digit and turned at right angles 

 to the other digits, so that it appears in 

 profile when the others are seen from the 

 top or bottom. All the digits terminate 

 in claws" of relatively great size, and that 

 of the reduced first digit is as large or 

 larger, absolutely, than those of the other 

 digits. There must have been consider- 

 able cartilage in the carpus, for, although 

 the bones have been separated and care- 

 fully cleaned, it is impossible to articulate 

 the elements with any accuracy. Fig.Sshows 

 the most probable position of the bones. 

 The pelvic girdle. — The pelvis is nearly perfect. The two 

 sides are preserved, so that the missing parts of one side are 

 supplied by the other. The only point of uncertainty is the 

 exact shape of the thin lower edges of the ischium and portions 

 of the edges of the pubis and ilium. As shown in Fig. 9, the 

 three bones meet in the acetabular cavity and are separate 

 through life. The ilium ends anteriorly in an abrupt elevated 

 crest and posteriorly is continued as a slender rod. The ischium 

 is a broad and very thin plate, nearly semicircular in outline ; 

 the bones of the two sides evidently met in a ventral symphasis. 

 The acetabular edge of the ischium is very strong and prominent, 

 and looks rather forward and upward than straight upward. 

 This is similar to the condition found in the Crocodilia and other 



Fig. 7. — Upper por- 

 tion of the ulna of the left 

 side. % natural size. 



