TERTIAllT A^EKTEBRATA OF THE FAYEM. 
:;0G 
AVKllli of froiil; of first vertebral shield BA 
(Greatest leiigth of ])lastron 40 
Lengtii of plastron in middle line B(j'5 
„ anterior lobe 9 
AVidth of anterior lobe 17’4 
liongtli of bridge 17'7 
„ posterior lobe 14 
AVidtIi of posterior lobe 20-5 
Length of ento])lastral in middle line 0 
„ byoplastral in middle line 8'5 
„ hypoplastral in middle line 9 
j, xipbiplastral in middle line 9 
„ intergular shield 0 5 
E. 3100. 
Anterior })ortion of a jdastron. The dimensions (in centimetres) are: — 
Length of anterior lobe of plastron . 
AVTdth of anterior lobe of plastron 
Length of entoplastral 
„ intergular shield . . . . 
9-5 
19 
/ 
Presented hy TF. 7A de Winton, Esq., 1903. 
E. 3120. Imperfect anterior lobe of plastron, probably of this species. 
Presented hy TT\ E. de Wintoyi, Esq., 1903. 
Order S QUA MAT A. 
Suborder 0 P II 1 1) I A. 
Family BOID^F. 
According to Boulengcr* this family includes snakes in wliicli the maxillary, 
palatine, and pterygoid bones are movable; transpalatine present; pterygoid extending 
to (piadrate or mandible; supratemporal present, attached scale-like to cranium, 
suspending (piadrate ; prefrontal in contact with nasal. Mandible with coronoid 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. 
* Catiil. Snakes Brit. Alus. vol. i. (1893) p. 71. 
