τὸ πλῆθος οὐκ εὐαρίθμητον ἦν → the crowd wasn't easy to count, the crowd was not small, it was not a small crowd
[Seite 378] τό, = ὄρινδα, Poll. 6, 73.
ὀρίνδιον: τό, ἴδε τὸ προηγ.