I think I left those off for a reason. In this particular case the bus is terminated at each end by the transceiver itself. If you have a long cable run, and the devices are connected somewhere in the middle, then yes, I believe the termination resistors are required.
One Transmitter, One Receiver
The simplest network is one transmitter and one receiver (Figure 6). In this example, a termination resistor is shown at the transmitter end of the cable. Although unnecessary here, it is probably a good habit to design-in both termination resistors. This allows the transmitter to be moved to locations other than the far end, and permits additional transmitters to be added to the network if that becomes necessary.