306 TERTIAEY YEETEBEATA OP THE FATtTM. 



Width of front of first vertebral shield 3-5 



Greatest length of plastron 40 



Length of plastron in middle line 36'5 



„ anterior lobe 9 



Width of anterior lobe 17"4 



Length of bridge 17'7 



„ posterior lobe . . 14 



Width of posterior lobe . . . 2Q-5 



Length of entoplastral in middle line t5 



„ hyoplastral in middle line 8'5 



„ hvpoplastral in middle line 9 



„ xiphiplastral in middle line 9 



„ intergular shield 6 5 



R. 3100. Anterior portion o£ a plastron. The dimensions (in centimetres) are : — 



Length of anterior lobe of plastron 9-5 



Width of anterior lobe of plastron 19 



Length of entoplastral 



7-2 



„ intergular shield 7 



Presented hy W. E. de Winton, Esq., 1903. 



E. 3120. Imperfect anterior lobe of plastron, probably of this species. 



Presented by W. E. de Winton, Esq., 1903. 



Order SQUAMATA. 



Suborder OPE ID I A. 



Family BOID^. 



According to Boulenger* this family includes snakes in which the maxillary, 

 palatine, and pterygoid bones are movable; transpalatine present; pterygoid extending 

 to quadrate or mandible ; suprateniporal present, attached scale-like to cranium, 

 suspending quadrate ; prefrontal in contact with nasal. Mandible with coroaoid bone. 

 Teeth in both jaws. Vestiges of pelvis and hind limbs usually terminating in a 

 claw-like spur visible on each side of the vent. 



* Catul. Snakes Brit. Mus. vol. i. (1893) p, 71. 



