How can I connect two emulated Macs together?

On my 2008 Aluminum MacBook, I have installed Basilisk II and SheepShaver in order to emulate Mac OS 7.5.3 and Mac OS 9.0.4 respectively. They are both set up to use DHCP to connect to the internet (through OpenTransport), with the networking connection being ped via SLIRP from my MacBook to the emulated machines. For some reason, my MacBook's IP address is shown as the router two which the two emulated machines are connected. If this is the case, then shouldn't the two emulated computers be able to talk to each other, seeing as they connected to the same "network"? Does anyone have any idea why this might not work'?