The goddess Mert is frequently met with in the oldest temples, where she always accompanies the king when represented running with a vase and the flagellum of Osiris in his hands, amidst various emblems.  Her name appears to be Milt, or Mert.  In the lower regions she has sometimes the united heads of a lion and crocodile, with the globe of Ra and the two long feathers of Amen; but this figure is of rare occurrence, and I believe only in funeral subjects, among the genii or minor deities connected with the dead.
    She usually bears on her head a cluster of the northern or southern water-plants, upon a cap terminating in a peculiar form at the back; from which it might seem that she was more particularly connected with the Lower Country, those water-plants being emblematic of that part of Egypt.  Sometimes, however, she has those of Upper Egypt; but the more frequent assumption of the former sufficiently proves that her name was not Mares, one of the appellations of the Thebaid. (The Manners and Customs of the Ancient Egyptians, Wilkinson, v.5, 1847).