Question about the input of AD5310R

Hi
Is the input data stream for the AD5310R correct at 16 bits long?

The chapter of "AD5310R SPI SERIAL DATA INTERFACE" of the data sheet is as follows.
"The SYNC pin must be held low until the complete data-word (16 bits) is loaded from the SDI pin, as shown in Figure 3.
Data from the SDI line is sampled into the input shift register on the falling edge of the SCLK. "
(Data Sheet AD5310R/AD5311R Rev.B)

However, I think Figure 3. (and Figure 40) show a 24-bit data stream.

Is the input data stream for the AD5310R correct at 16 bits long?

Best regards