OPHTHALMOSAUEUS ICENICUS. 75 



luterclavicle (text-fig. 34) : greatest length in middle line . . 13-8 



length of cross-bar . . (approx.) 23-0 



Ischio-pubis ; length 14-7 



width of proximal end 51 



„ distal end 7"1 



E. 2147 (Leeds Coll. 6S). Centra o£ fifteen precaudal vertebrae, nine neural arches, and parts o£ the 

 clavicular arch including the median portions of both clavicles, the right one closely 

 united with the corresponding portion of the iuterclavicle. Both clavicles seem to be 

 somewhat deformed ; that on the right side may have been fractured and afterwards 

 mended during the animal's life. 



R. 2141. Twenty-two precaudal, twenty-nine anterior caudal, and eight posterior caudal centra of 

 a small individual. Some of the posterior caudals are from near the end of the tail 

 and are very small. The dimensions of one are : length 1 cm., width 1*25 cm., 

 heio'ht 1'3 cm. 



'a 



R. 2157 (Leeds Coll. 29). Centra of twelve precaudal and nineteen caudal vertebrse of an old 

 individual. 



R. 2139 (Leeds Coll. 73). Centra of eleven vertebrse, six neural arches, one scapula, one coracoid. 



R. 2164. Basioccipital, basisphenoid (text-fig. 6, A), stapes. The parasphenoid extends round the 

 sides of the carotid foramen. 



The dimensions (in centimetres) of these bones are : — 



Basioccipital : greatest length . , 6-4 



„ width 8-7 



Basisphenoid : greatest length 7-0 



„ breadth 9-0 



Stapes : length 7'2 



width of inner end 4-9 



R 2134. Right fore paddle. Co-type described and figured by Seeley in Quart. Journ. Greol. See. 

 vol. XXX. (1874) p. 703, pi. xlvi. fig. 3. 



The dimensions (in centimetres) of this specimen are ; — 



Humerus : length . 17-6 



width at proximal end . 12-7 



„ middle of shaft 8-0 



„ distal end 14-3 



Eadius : length 7-6 



width 7-0 



Ulna : length 5-9 



width 7-6 



L 2 



