267, is one in which a cheek is cut from only one side.

It is used where the rail is thinner than the stile and it is desirable to keep the mortise near the middle of the stile.
_No.45.A housed mortise-and-tenon_, Fig.

267, is one in which the whole of the end of one member is let in for a short distance or "housed" into the other.

It is common in grill work and in railings.
_No.46.A slip-joint or end or open mortise-and-tenon_, Fig.

267, is what would remain if a mortised member were sawn off along one side of the tenoned member.