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Records of the Australian Museum (2009) Vol. 61 
Appendix 
Key to genera and species from the Kimberleys and elsewhere in the Indo-West Pacific dealt with in 
present paper. 
1 
Operculum absent . 2 
Operculum present. 4 
Number of thoracic chaetigers 10. Kimberleya hutchingsae n.gen. & n.sp. 
Number of thoracic chaetigers 7 . 3 
Apron present. Protula bispiralis (Savigny, 1820) 
Apron absent. Pseudoprotula kimberleyensis n.gen. & n.sp. 
Operculum chitinous. 5 
Operculum calcareous.genus Spirobranchus Blainville, 1818. 21 
Operculum cylindrical or conical, divided into a number of parti¬ 
tions . 6 
Operculum consists of other forms 
7 
Opercular diameter greater than height, maximum number of 
partitions: about 4 or 5 . Vermiliopsis cylindrica n.sp. 
■ Opercular height less than diameter, conical, maximum number of 
partitions numerous. Vermiliopsis glandigera Gravier, 1908 
Operculum consists of a central column bearing a series of saucer¬ 
shaped discs and circles of spines. Pomatostegus actinoceros (Morch, 1963) 
■ Operculum consists of other forms. 8 
8 Operculum consists of a funnel-shaped structure (infundibulum) 
surmounted by a corona (or verticil) of characteristic processes 
.genus Hydroides Gunnerus, 1768 . 9 
—— Operculum consists of an infundibulum only. 17 
9 Corona consists of six roughly diamond-shaped swollen processes, 
one larger than the rest, their tips curved towards the centre, 
and each bearing a short triangular spine on each shoulder; 
infundibulum cup-shaped, its marginal lobes end in T-shaped 
to crescentic tips. Hydroides adamaformis n.sp. 
-Corona and infundibulum consist of other forms . 10 
10 Corona consists of up to about 10 tapered spines, the most dorsal 
one larger than the rest, their tips curved towards centre of crown, 
and the rest curved outwards; infundibulum funnel-shaped, 
its radii ending tapered outwardly curved tips. Hydroides exaltatus (Marenzeller, 1885) 
-Corona and infundibulum consist of other forms . 11 
11 Corona consists of 5 similar triangular processes, each bearing 
medially at its base about 4 or 5 tiny spines, and ending distally 
in a transparent bluntly pointed transparent anteriorly directed tip; 
its marginal lobes minute, acutely triangular, their tips outwardly 
curved. Hydroides kimberleyensis n.sp. 
-Corona and infundibulum consist of other forms . 12 
