[jQuery] Wrapping tags that are not decendents

[ml1]

I am trying to figure out how to wrap "all a tags that are class
myclass but are not descendents of divs that are class otherclass".

ie
match this:
<div class="thirdclass"><a href="" class="myclass"></a></div>

match this:
<a href="" class="myclass"></a>

but not this:
<div class="otherclass"><a href="" class="myclass"></a></div>

Something like $('a.myclass:not(DESCENDENTOF div.otherclass)'), but
I'm not sure what DESCENDENTOF would be here.

Thanks!