76 MAEINE EEPTILES OF THE OSFOED CLAY. 



E. 2175. A series o£ vertebral centra and a right coracoid of a young individual. The vertebra? 

 include the atlas and axis (text-fig. 24, C & D), the line of junction o£ which is shown 

 b}' a sharply-defined gToove which is only interrupted at the floor of the neural canal ; 

 the axis has distinct diapophysial and parapophysial facets ; the position of the inter- 

 vertebral wedge-bones is shown by the facets with which they united. There are 

 twenty-nine other precaudal vertebrEe and twenty-eight caudals. The small coracoid 

 presents no remarkable characters. 



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



Atlas and axis : combined length ■ 2-6 



depth of centra 4*2 



width of centra 4-9 



Anterior caudal vertebra : length of centrum 2-2 



depth of centrum o'l 



width of centrura 5'3 



Coracoid : greatest width 9'9 



„ length 11-8 



E. 2169 (? Leeds Coll. 80). Twenty -four caudal centra ; of these, one from the bend of the tail ami 

 another further back are figured (text-fig. 28). Also three neural arches. 

 The dimensions (in centimetres) of the first figured centrum and arch are : — 



Centrum : length at neural canal 2*1 



„ ventral edge 1'7 



width 3-7 



height 4-1 



E. 3533. Portions of a young skull and skeleton, including basioccipital, exoccipital, supraoccipital, 

 stapes, opisthotics, quadrates, pterygoids, squamosals, maxillae, nasals, vomers (text- 

 fig. 19), and other bones of the skull and mandible. Sixty vertebral centra, some 

 neural arches and ribs. 



E. 3535. Bones of skull and skeleton of a large individual, including parietals, frontals, and 

 squamosals united (text-fig. 15), basisphenoid with parasphenoid, quadrates, stapes, 

 opisthotic, portions of pterygoid, two vertebral centra ; also the cla'vdcular arch. 

 Numerous sclerotic plates. 



E. 3534. Eighteen centra of caudal vertebne, mostly with the neural arches and ribs associated 

 with them (text-fig. 27). Also imperfect shoulder-girdle, fore paddles, imperfect pelvis, 

 hind paddles. 



Note. — In the explanation of fig. 40 (p. 59), for " Left isehio-pubis of OpJithaTmosaurxis : A, from outer 

 side ; B, proximal end ; C, from inner side," read " Eight iseliio-pubis of Ophtlialmosaiirus : 

 A, from inner side ; B, proximal end ; C, from outer side." 



