Try this one--no scales but does have bone illustrations:
 
        Olsen, Stanley J.
          1968  Fish, Amphibian and Reptile Remains from Archaeological
Sites.  Part 1.                 Southeastern and Southwestern United States.
Papers of the Peabody                 Museum of Archaeology and Ethnology 56(2).
 
                                Lucy Wayne
>All,
>   Apologies for cross-posting.
>
>We are in need of a very good book on telling apart different fish
>remains from a 17th century coastal site in Virginia.  We have recently
>come across a trashpit with thousands of different types of scales and
>bones and would like to find out the species.  (I can do sturgeon, gar,
>and the rest of the common fish, but some of this stuff I have never seen
>before!)  Anyone know of such a book?  Thanks.
>
>--
>Steve Boxley,  Ja.T., M.N.
>The Virginia Foundation for Archaeological Research, Inc.
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>
>