Sagitocyst or Sagittocyst: How To spell?
The word Sagitocyst is misspelled against Sagittocyst, a noun meaning "A defensive cell containing a minute rodlike structure which may be expelled. Such cells are found in certain Turbellaria."
Sagittocyst has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings sagi & ocyst which should not be misspelled with single 'T'
Wrong Spelling:  sagi-t-ocyst  Correct Spelling:  sagi-tt-ocyst 
Find more incorrect spellings of Sagittocyst to spell right way.