PRIMORDIUM DEVELOPMENT 



177 



Fig. 45. Rejoining in oral primordia. 



A. After cross-cuts, a: Stage-3 primordium of a divider 

 transected 6 times, b: Anlage continues developing in normal 

 time, severed parts rejoining as the animal reorganizes instead 

 of dividing, c: Perfect but tiny mouthparts formed, possibly 



