ſea, proceeding from Dioſcurias, round the Northern and Weſtern ſhores, as far as Byzantium. This ſurvey, as it ſeems to be, is probably the work of some other hand; as it is leſs correct than the former parts, and the materials, of which it is compoſed, might be collected by Arrian from various perſons, in order to complete the circuit of the Euxine ſea.
In the computation of the meaſurements referred to in this Diſſertation, I have followed the calculation laid down by the late Dr. Reinhold Forſter, in the Geographical Diſſertation annexed to Spelman's Tranſlation of Xenophon's Anabaſis, which ſates, that 960 Greek feet are equal to 967 Engliſh, and, of courſe, that a ſtadium of 600 Greek feet would be equal to 604 Engliſh feet, and 375 decimal parts.
My reaſons for adopting this calculation will be ſeen in a Diſcourſe annexed to the preſent work.
I proceed now to the examination of the Periplus.
The Title of it, according to the Cæſarean MS. is as follows.
Ἀῤῥιάνου Περίπλους Εὐξείνου, καὶ
Βιθυνίας τῆς ὡρὸς τὸν Πόντον.
Περίπλους Παφλαγονίας.
Περίπλους Πόντων τῶν δύω.
Περίπλους τῶυ ἐν τῇ Εὐρώπῃ μέρων τοῦ Πόντου.
Περίπλους Θράκης καὶ ὡρὸς Πόντον.
Perhaps theſe different heads, or diviſions, as they appear to be, may have been the titles of ſome ancient detached accounts, from which a part at leaſt of the Periplus may have been compiled. The voyage ſeems to have been intended for the purpoſe of geo-
