In the Loeb Classical Library translations
of Plato's Dialogs, the stephanus numbers appear on the left
(Greek) side of the page, out in the left margin.
In some other translations the stephanus
numbers are included in brackets right in the middle of the text. Some
translations, unfortunately, do not include stephanus numbers.
We will be using stephanus numbers in this course only because there
may be some people in class who will be using different translations
or different editions of the Dialogs, and this standard pagination can
let us all refer to the same spot in the text.