132 ILYSUDA. 
Cranial bones more or less solidly united ; transpalatine present ; 
pterygoid extending to quadrate; supratemporal very small and 
wedged in between the adjacent bones ; quadrate very short ; pr- 
frontal in contact with nasal. Mandible with coronoid bone. 
Teeth in jaws and on palate. Vestiges of pelvis asin the Boida, 
and terminating in a claw-like spur usually distinguishable on each 
side of the vent. 
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Skull of Zlysia seytale. 
This family forms a passage from the Boide to the Uropeltide, 
agreeing with the latter in the physiognomy and scaling, with the 
former in the presence of vestiges of pelvis, whilst the skull is 
exactly intermediate. 
Ceylon and South-eastern Asia; Tropical South America, 
Synopsis of the Genera, 
Premaxillary teeth; eye in an ocular shield ; no mental groove. 
1, Tlysia, p. 133. 
No premaxillary teeth ; eye distinct fron the surrounding shields ; 
no mental groove .......see eee 2, Anomalochilus, p. 134. 
No premaxillary teeth ; eye distinct from the surrounding shields; 
a mental groove ......++sesee008 3. Cylindrophis, p. 134. 
