Here are some notes for the map:
1) Tranquillitatis, though deep and coral-rich, lacks inhabitants of its own; the mysterious, shadowed citadel of Maskelyne casts a gloom across the waters, which even the gnomes of the Taurus Mounts feel little drive to investigate. Certainly the witch-wary margasta tribes, who claim the trifold isthmus between Tranquillitatis, Foecunditatis and Nectaris, believe the dour city's island to be cursed. They believe the same -- and rightly -- of the far shores of Foecunditatis, where many in the montane villages of yaks and goatherds are as human as you or I.http://www.pandius.com/emerge.html
2) Although there are exceptions -- the margasta are every bit as fanatical about mummifying their deceased as Nithians are, and the bhuts of Vedal don't tolerate the competition -- most HM natives have given up on their ancestral burial-customs or cremation practices, in favour of leaving the dead "to lie in state" in some isolated locale, and turning a blind eye to pisachas' comings and goings.http://www.pandius.com/sor_efct.html
3) They're Hollow Moon rakasta. Rather small and timid, compared to most of the Mystaran breeds, which is why more aggressive species drove them extinct there; their closest cousins are the ocelot-breed from that old Dragon article on rakasta subraces, so I named them for margeys. Simple hunter-fisher tribesfolk, very good at hiding and slinking around, with a deep fear of curses and bad luck.
Hey, it's a nocturnal game-setting! Cat-people certainly belong there.
4) Gutenberg's (lowest left corner caldera on the map) lava-flows follow the same path southward, year after year, building up a long ridge that reaches much of the way to Mare Nectaris while seldom endangering any lives. http://pandius.com/ndisastr.html