Parnasian or Parnassian: How To spell?
The word Parnasian is misspelled against Parnassian, a noun meaning "Any one of numerous species of butterflies belonging to the genus Parnassius. They inhabit the mountains, both in the Old World and in America."
Parnassian has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings parna & ian which should not be misspelled with single 'S'
Wrong Spelling:  parna-s-ian  Correct Spelling:  parna-ss-ian 
Find more wrongly spelled words of Parnassian to spell it well.