). East of the mouth of the Halys, Arrian (p. 16) mentions a marsh and port Naustathmus, 90 stadia from the Halys, or 120 according to Marcian. Fifty stadia further along the coast Arrian places Conopeium, a marsh.
The site seems to be Koumjaas,
on the coast SE. of the mouth of the Halys or Kizil Irmak.
vol. i. p. 293) makes Conopeium 16 miles from Amisus (Samsun
), which is to the south, and about 5 miles from Naustathmus, which is to the north.