
1) Class 2) Class hirudinea
Found on
https://www.crosswordclues.com/clue/hirudinea

• (n. pl.) An order of Annelida, including the leeches; -- called also Hirudinei.
Found on
http://thinkexist.com/dictionary/meaning/hirudinea/
Hir`u·din'e·a noun plural [ New Latin , from Latin
hirudo ,
hirudinis , a leech.]
(Zoology) An order of Annelida, including the leeches; -- called also
Hirudinei .
Found on
http://www.encyclo.co.uk/webster/H/48

Type: Term Pronunciation: hir′ū-din′ē-ă Definitions: 1. The leeches, a class of worms (phylum Annelida) with flat, segmented bodies, a sucker at the posterior end, and often a smaller sucker at the anterior end; they are predatory on invertebrate tissues, or feed on blood and tissue exudates of vertebrates.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=41075

The hirudinea are the leeches. They are an ectoparasitic class of annelids with few true segments but each segment shows numerous annuli. Suckers are present at both ends of the body. They lay eggs in cocoons secreted by the clitellum.
Found on
http://www.probertencyclopaedia.com/browse/BH.HTM

[
n] - hermaphroditic aquatic or terrestrial or parasitic annelids
Found on
http://www.webdictionary.co.uk/definition.php?query=Hirudinea
class Hirudinea noun hermaphroditic aquatic or terrestrial or parasitic annelids
Found on
https://www.encyclo.co.uk/local/20974

the class comprising the leeches.
Found on
https://www.infoplease.com/dictionary/hirudinea
No exact match found.