2 Planktonic and probably a larval form. Cirrophores of dorsal 



cirri elongated {D)ifscln(t) U. pvlliicidu 



2' Benthonic forms. Cirrophores not elongated :5 



3 Body with about 26 segments and 12 pairs of elytra. Notosetae 



numerous {L( pidoiiotiis} 4 



'V Body with more than 50 segments and 18 or move ])airs of 



elytra. Notosetae few or absent 5 



4 Margins of elytra fringed and surface with minute rounded 



microtubercles only L. xnlihris 



4' Margins of elytra fringed and surface with both macrotubercles 



bearing 3-5 blunt projections ami numerous microtubercles L. raridhiHx 



5 A few fine notosetae. Neurosetae of middle segments include 



1-2 giant setae. Elytra mottled, with a white central spot 



and irregularly arranged on posterior segments Lcpida iiiitria cnnnHciisdlis 



5' No notosetae at all. Neurosetae include fine blunt forms 

 superiorly and stouter bidentate forms inferiorly. but no 

 giant setae. Elytra half brown, half white Lcpichi^tJiciiift sp. 



6 Neurosetae with a large s]Mnous pocket at base of blade. 



[{Snbadijtc). Notosetae stout with coar.se serrations] S. pi Uncidn 



6' Neurosetae with basal serration smaller than distal ones . . .T 7 



7 All neurosetae with unidentate tips 8 



7' Most neurosetae with bidentate tijxs 10 



8 Neurosetae mostly tapered to fine hairlike tips. [Body with 



less than 40 segments (AntimxlUi). Anterior pair of eyes 



larger than posterior pair] A. xaisi 



8' Neurosetae with strong, often curved tips 9 



it Body with 50-80 segments. Few (4-10) .stout notosetae. Elytra 

 translucent, not fringed, but covered with conical micro- 

 tubercles H(n-iiHith<ic (Hi i-i)iadiiiii ) lira iirllin 



9' Body with 35-49 segments. Notosetae numerous and finer 

 than neuro.setae. Elytra fringed with papillae and surface 

 covered with microtubercles Gnttijium rin-nsn 



10 Elytra with a well developed marginal fringe 11 



10' Elytra without a marginal fringe or with merely a few 



small marginal papillae. [Surface covered with numerous 

 microtubercles and a few ovoid macrotubercles at posterior 

 mai'gin. Eyes anteroventral 1 Hiirniiitliin im/iriciita 



11 Elytron surface divided into polygonal areas bearing lai'ge 



pointed tubercles Hiii'ninllioi (iciiliuta 



ir Elytron surface not divided into polygonal areas and bears 



only microtubercles. [Notosetae few and stout.] Harnioflior tn'Diarnlatd 



5 



