http://www.aa.psu.edu/div/mns/biology/crayfish/crayfishtable.htm

http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/crayfish/crayfishdissectlist.html

http://www.flushing.k12.mi.us/srhigh/tippettl/biology/cray/