hirudinei

from The Collaborative International Dictionary of English v.0.48

Hirudinea \Hir`u*din"e*a\, n. pl. [NL., fr. L. hirudo,
   hirudinis, a leech.] (Zool.)
   An order of Annelida, including the leeches; -- called also
   {Hirudinei}.
   [1913 Webster]