Apendices or Appendices: How To spell?
The word Apendices is misspelled against Appendices, which is plural of "Appendix"
Appendices has double "pp" is mispronounced as "p"Remember double 'PP' in between the strings a & endices which should not be misspelled with single 'P'
Wrong Spelling:  a-p-endices  Correct Spelling:  a-pp-endices 
Find more wrongly spelled words of Appendices to spell it well.