64; MARINE EEPTILES OF THE OXFOED CLAY. 



Scapula (text-fig. 21, A, B) : 



extreme length 23-8 



width of neck 5'1 



greatest anteroposterior length of anterior expansion ... 9-4 



width of dorsal ramus 4*5 



length of glenoid surface 4 - 8 



,, coracoid surface 4 - l 



Humerus : 



length 33-0 



width of upper end 8'4 



,, shaft at narrowest 7 - 



„ distal end 17*6 



Ilium (text-fig. 24) : 



length 16-2 



Ischium (text-fig. 24) : 



greatest length (parallel to the long axis of the body) . . . 37 - 6 



width of proximal (articular) end 9"5 



„ neck 8-4 



length of median expansion 30 - 3 



width of middle of median expansion .... (approx.) 14-0 



„ acetabular surface 6-2 



Pubis (text-fig. 24) : 



greatest length (parallel to the long axis of the body) . . . 33-S 



greatest width 3O0 



Femur : 



length 39-0 



width of upper end 9-4 



„ shaft at narrowest 7 - 2 



„ distal expansion 19-3 



R. 3317. Fossilized contents of the stomach lying within the ribs. The bard mass includes 

 many stones varying in size from that of a small hen's egg downwards. The stones 

 are of various kinds, including quartz, sandstone and gneiss ; they are mostly angular 

 with the angles somewhat rounded. The mass in which the stones are embedded, 

 consists niainly of angular grains of quartz of various sizes, and mingled with these are 

 numerous hooks from the arms of Cuttle-fishes, and black masses which show the 

 characteristic structure of the ink-bags of those creatures. This is the specimen 

 described in the Introduction to Pt. I. of this Catalogue, pages xvi-xvii. 



R. 2679 (Leeds Coll. 42). Skull, mandible, teeth, atlas, and axis, together with twelve other 

 cervical vertebrae ; some portions of ribs, radius, ulna, and greater part of the remaining 

 bones of one fore paddle. The skull (PL IV. fig. 2) is less crushed than usual ; it 

 was described and figured in the Ann. Mag. Nat. Hist. [6] vol. xvi. (1895) p. 242, 

 pi. xiii. fig. 2, and forms the basis upon which the description given above is founded. 

 The teeth figured on PI. IV. figs. 3, 4, belong to this specimen. The cervical vertebras 

 for the most part still have the cervical ribs and neural arch attached, but they are much 

 distorted. 



