Hexactineline or Hexactinelline: How To spell?
The word Hexactineline is misspelled against Hexactinelline, an adjective meaning "Belonging to the Hexactinellinae, a group of sponges, having six-rayed siliceous spicules."
Hexactinelline has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings hexactine & ine which should not be misspelled with single 'L'
Wrong Spelling:  hexactine-l-ine  Correct Spelling:  hexactine-ll-ine 
Find more wrongly spelled words of Hexactinelline to spell it well.