Hypoclayda or Hypocleida: How To spell?

The word Hypoclayda is misspelled against Hypocleida, which is plural of "Hypocleidium"

Word contains consecutive vowels 'EI' in between alphabets hypocl & da is misspelled as 'AY'
Wrong Spelling:  hypocl-ay-da 
Correct Spelling:  hypocl-ei-da 
Find more incorrect spellings of Hypocleida to spell right way.