OPHTHALMOSAUEUS ICENICUS. 71 



Tooth : length of crown 1-5 



diameter at base of crown -6 



Coracoid: length 22-6 



width 19-3 



Scapula: length 24-0 



width at narrowest part of blade 4-6 



„ of proximal expansion . 13-8 



S. 2185. Portions of the skull of an old individual. The bones preserved are the quadrates 

 with the adherent portions of the pterygoid and, on one side, of the stapes, the left 

 opisthotic, one pro-otic, portions of the sqnainosal, and the parietals. With these are 

 associated parts of the mandible, the centra of three precaudal and three caudal 

 vertebrse, fragments of the coracoids, the right humerus, both radii, one ulna, and 

 thirty- six other paddle-bones, also one femur. Most of the bones are crushed and 

 distorted. 



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



Quadrate : length 11'2 



width at neck 6-3 



Stapes : length 6*6 



Opisthotic : length 6-9 



Coracoid : "width (approx.) 19'5 



Humerus : length 17'5 



Femur: length ll-l 



R. 2191. Portions of skull and mandible, hyoid, and some fragments of ribs. Of the skull the 

 nasals, one maxilla, one lachrymal are the best-preserved elements ; in the mandible one 

 of the articulars, the splenials, and some other parts are present. The length of the 

 hyoid is 16"7. 



R. 2155. Portions of skull and mandible, including the basioccipital, basisphenoid, both stapes, 

 opisthotic, both articulars, and fragments. Also the fused atlas and axis, with twenty 

 other precaudal centra and right humerus. 



The dimensions (in centiuietres) of some of these bones are : — 



Basioccipital : greatest length 7'1 



„ width 8"5 



width of occipital condj^le 6-8 



Basisphenoid : greatest length 7"6 



„ ^^^dth 9-8 



Stapes : greatest length 7-o 



width of inner end 5'6 



Atlas and axis : length 4-5 



width S-6 



height S-.2 



Humerus : length (approx.) 16-5 



