OPHTHALMOSAUfiUS ICENICUS. 65 



Maxilla (text-fig. 13) : length (approx.) 26-0 



greatest depth 5-2 



width at palatine plate 2-8 



Premaxilla : length in front of anterior angle of nares . . . 49"0 



depth (approx.) 4-6 



Pterygoid (text-fig. 17) : length (approx.) 43'0 



Quadrate : greatest length 13'4 



width of neck O-o 



„ articular surface 5'1 



Articular bone (text-fig. 22) : length of articular surface . . 7"1 



length 5-9 



anterior depth 4*9 



Atlas and axis (crushed) : length 4'3 



Anterior j)recaudal (? cervical) : length 2-8 



width 6'2 



Middle precaudal : length 3 8 



width 8-0 



Anterior caudal : length 2-5 



width 7-8 



Anterior caudal (crushed, see text-fig. 31, B) : length . . . 1-7 



width 8-0 



Middle caudal (near bend) : length (at neural canal) .... 1-9 



width 4"4 



Posterior caudal (behind bend) : length 1-7 



width 2-7 



Anterior (cervical) neural arch (text-fig. 29) : height to top 



of spine 8*2 



Posterior (dorsal) neural arch : height to top of spine . . . 11 '3 



antero-posterior width of spine. 3-0 



Clavicular arch : length of clavicle (in straight line) .... 30-0 



A^idth between outer ends of clavicles . . . 48'0 



length of interclavicle in mid-line .... 12-9 



Scapula : greatest length 20-0 



width of proximal expansion 13'2 



„ blade (in middle) ..... (approx.) 4-4 



Coracoid : approximate width 19-0 



„ greatest length 21-0 



Humerus : length lo'o 



width of shaft at narrowest 7-1 



„ distal end ll'S 



E. 2181 (Leeds Coll. G6). Imperfect skull and skeleton o£ a Yery young individual. In thi.< 

 specimen the anterior portions o£ the jaws bear a number o£ small, very closely crowded 

 and rather backwardly directed teeth (Fl. I. figs. 7, 8) : in the anterior part of the 



right side of the mandible there are ten on a space of 5'5 cm. The pubis and ischium 

 show no more sign of separation than in older individuals, and the same may be said of 



the atlas and axis vertebrae. The portions of the skull preserved include : basioccipital, 



K 



