Approximate translation, with Google translate:

“Even the name of the Mures river that bears him prince of Transylvania, which appears in the form of medieval historical documents Morisius (Cod. Arpadianus, XVIII 62. 1291) Marusius (Kemény, Nititia, II. 41), Morusius (Schuller , Archiv. I. p, 680), we emphasize that a strong old remote, this river basin water was only one dead (Marusic).

Moreover, even today there is a widespread ancient tradition and strong, that the plains of Wallachia, Transylvania, Hungary and the valleys were once covered by an internal sea.
Thus, George Brancovici Chronicle, written by him years 1688-1690, contains the following about the great tradition of the countries of Dacia:

“This Pombal (Pompey the Great) to cut the dike to Byzantium in the White Sea entered the Black Sea, and may have remained dry, Moldavia, Nera Nera Muntenescă and pepper” (Ar. Densusianu, critical-literary magazine 1893 p. 367).

This tradition, the Black Sea in a distant era would not have output. Tell a peripateticul expressed and the Lampsac Strato (c. 270 BC f,), Black Sea, said the dance would have been a-date with everything closed and the Bizantiu Strait would be opened after enormous pressure of water bodies, rivers spilled their large tip the sea. The same thing happened, says Strato, and the Mediterranean, which from a large accumulation of river waters, the barrier would be broken at sunset, and then into the sea reversându external, have elapsed and the lake drained sites before Europe’s (Strabo, geogr. I. 3. 4.)

May we note here that in Hungary, a tradition still esistă people that countries that were once plains covered by water, which later drained through the step-by-iron gates. Értekezések the cake. tudom, körébıl. XII. VIII. sz. p. 59.”

To anda (the only comment I bothered to read, because I was writing just below it): The area between the Adriatic and the Black Sea was never called Illyria. Check your sources, mainly Herodotus and Thucydides! The Romans did not amuse themselves by giving new names to regions. Do your homework, people, you appear to know how to read and write!