68 MAETNE EEPTILES OF THE OXFOED CLAY. 



Femur: length 9-8 



width of shaft at narrowest 3'6 



,, distal end 6-8 



Ischio-pubis : length 13'3 



R. 3853 (Leeds Coll. 85). Fra^-ments of skull, incliidino- pterygoids, sclerotic plates, six centra of 

 vertebrae, both scapulae, fragment of coracoid and claYicles, interclavicle, both fore 

 paddles complete (the left is figured in text-fig. 37, and also by A. S. Woodward in 

 ' Outlines of Vertebrate Palajontology,' p. 182, fig. 113, B), ilia (text-fig. 38), both 

 ischio-pubes (text-fig. 39, A— C), both femora and numerous paddle-bones. 

 The dimensions (in centimetres) of some of the bones are : — 



Scapula : greatest length 25'0 



width of blade at narrowest o-2 



„ distal expansion 14'3 



Eight humerus : length (approx.) 19-0 



width of shaft at narrowest . . ... 10-1 



,, distal end 15'5 



Eight radius : width 6-5 



length (approx.) 6'5 



Eight ulna : width (apprt-x.) 8'0 



length 4-8 



Eight intermedium : width 7'8 



length (approx.) 6-0 



Ilium (text-fig. 38) : length in straight line 12-0 



greatest width ... 3-1 



width of lower end 3*2 



Ischio-pubis (text-fig. 39, A-C) : length 15-9 



width of proximal end .... 4-0 



„ distal eud 6-9 



Femur: length 11*5 



width of shaft at narrowest 3-4 



„ distal eud 6-5 



Tibia: length 3-8 



width .... 3-7 



Fibula : length 3-2 



width 3-9 



K. 2149 (Leeds Coll. 70). Portions of a skull and mandible, including basisphenoid, stapes, opis- 

 thotics, one pro-otic, squamosal, parietal, both articulars, one surangular, and other 

 fragments ; atlas and axis, thirty other precaudal and t-wenty-five caudal vertebrae ; 

 the clavicles, scapulae, coracoids, left humerus, and twenty-three paddle-bones ; one 

 ilium aud both imperfect ischio-pubic bones. This skeleton does not present any very 

 notable features : the vertebrae are for the most part crushed ; the clavicles show clearly 

 the surfaces by which they unite with the cross-bar of the interclavicle ; the ischio-pubic 

 bones are rather shorter and stouter than in most specimens. 



