The main divisions of Christian Coptic as recognized and named at present are: Sahidic (formerly called Theban), spoken in the upper Thebais; Akhmimic, in the neighborhood of Akhmim, but driven out by Sahidic about the 5th century; Fayumic, in the Fayum (formerly named wrongly Bashmuric, from a province of the Delta); Bohairic, the dialect of the coast district (formerly named Memphite), spoken in the north-western Delta.
Sahidic and Bohairic are the most important In the temple of- Philae, where the worship of Isis was permitted to continue till the reign of Justinian, Brugsch found demotic inscriptions with dates to the end of the 5th century.
They are found in various dialects of Coptic, the mutual relations of which are not Coptic. yet certain, but the only ones which are preserved with any completeness are the Bohairic, or Lower Egyptian, and Sahidic, or Upper Egyptian, though it is certain that fragments of intermediate dialects such as Middle Egyptian, Fayumic, Akhmimic and Memphitic also exist.
The Bohairic has been edited by G.
Horner's researches tend to show that the Greek text on which it was based was different from that represented by the Bohairic, and probably was akin to the " Western " text, perhaps of the type used by Clement of Alexandria.