In the MAX31740 datasheet (Rev 0; 5/13), Yes, the MOSFET in Figure 1 on page 7 is a drawn as a depletion mode PMOS, but should be an enhancement PMOS. The graphs below shown in Figure 2 reflect an enhancement type PMOS..
Both a depletion and enhancement mode PMOS can be implemented in the circuit, but note that the graph will change depending on which FET type is used.