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Re: Archaeopteryx

In a message dated 6/16/03 2:36:22 PM Pacific Daylight Time, 
npharris@umich.edu writes:

<< Do I seem to remember that kiwis sometimes develop digits I and II, and 
 sometimes II and III (or, if you prefer, II and III as opposed to III and 
IV)? >>

Yeah, but is this a frame-shift or just differential digital development?