Most also have laterally compressed bodies , ventral scales are much reduced in size , their nostrils are located dorsally -LRB- no internasal scales -RRB- and give birth to live young -LRB- ovoviviparous -RRB- .

Ventral scales are much reduced in size , the nostrils of the snakes are located dorsally -LRB- no internasal scales -RRB- . They give birth to live young -LRB- ovoviviparous -RRB- .
