▁second ▁and ▁fourth ▁max ill ary ▁teeth ▁are ▁the ▁largest ; ▁the ▁latter ▁being ▁the ▁largest ▁to oth ▁of ▁all . ▁Of ▁the ▁ten ▁teeth ▁of ▁the ▁lower ▁j aw , ▁the ▁first ▁two ▁are ▁rather ▁straight ▁with ▁an ▁o val ▁cross - section ▁and ▁lack ▁dent icles . ▁The ▁third ▁to oth ▁has ▁dent icles ▁at ▁its ▁base ▁and ▁a ▁fl atter ▁top ; ▁the ▁other ▁seven ▁are ▁more ▁rec ur ved ▁and ▁fl atten ed ▁along ▁their ▁entire ▁height ; ▁gradually ▁the ▁dent icles ▁reach ▁the ▁a pe x . ▁ ▁Post c ran ia ▁ ▁The ▁verte br al ▁column ▁of ▁Sci p iony x ▁probably ▁includes ▁ten ▁cer v ical ▁verte bra e ▁and ▁th ir teen ▁d ors al ▁verte bra e ; ▁due ▁to ▁the ▁fact ▁the ▁spec imen ▁is ▁just ▁a ▁h atch ling , ▁the ▁different iation ▁between ▁the ▁two ▁categories ▁has ▁not ▁fully ▁developed , ▁making ▁any ▁distinction ▁rather ▁arbitrary . ▁With ▁certain ty ▁five ▁sac ral ▁verte bra e ▁are ▁present . ▁The ▁foss il ▁has ▁preserved ▁just ▁nine ▁tail ▁verte bra e ; ▁likely ▁fifty ▁or ▁more ▁had ▁been ▁originally ▁present . ▁The ▁neck ▁verte bra e ▁are ▁op is th oco el ous . ▁The ▁axis ▁is ▁p neum at ised ▁as ▁a ▁p neum at op ore , ▁an ▁opening ▁through ▁which ▁a ▁di vert icul um ▁of ▁the ▁air ▁s ack ▁of ▁the ▁neck ▁base ▁could ▁reach ▁its ▁h ollow ▁interior , ▁is ▁visible ▁on ▁its ▁side . ▁The