(Ni‘ihau) Carelia sinclairi: Only two species are known to be endemic to Niʻihau, one of which is in the genus Carelia. This genus is endemic to both Ni‘ihau and Kaua‘i and so this species was chosen among the two. Unfortunately, all Carelia spp. are considered as extinct, but we still hope that there may be a species that remains alive for us to rediscover. These shells can still be found in fossil deposits and have been made into shell lei.