Family NOTOMMATIDAE 



No lorica; no bristles or projections from the corona; 



foot projecting squarely posteriorly 



Common genera — Jslotonimata Eosphora 



Taphrocampa Cephalodelh 



Proales Monommata 



Pleurotrocha 

 Family DICRANOPHORIDAE 



Similar to the preceding family, hut with two eyes in 

 the neck; often grouped with the preceding family 

 Common genus — Dicranophorus 

 Family TRICHOCERCIDAE 



Lorica entire, often asymmetrical; with one toe or two 

 unequal toes or two equal, short toes 

 Common genera — Trichocerca 

 D.urella 

 Family CHROMOGASTRIDAE 



Lorica regularly outcurved, of two convex plates; no 

 foot 



Common genus — Chromogaster 

 Family TRICHOTRIIDAE 



Lorica entire; foot and toes about as long as the body 

 or lorica with long dorsal spines 

 Common genera — Trichotria 



Macrochaetus 

 Scaridium 

 Family MYTILINIDAE 



Lorica with three or four plates 

 Common genus — Mytilina 

 Family ASPLANCHNIDAE 



Sac'like; intestine usually absent; foot absent or small 

 and projecting from the rear of the ventral side 

 Common genera — Asplanchna 



Asplanchnopus 

 Family SYNCHAETIDAE 



Corona with several long bristles; with or without 

 paddle-like appendages; no lorica; with or without a foot 

 Common genera — Synchaeta 

 Polyarthra 

 Family PLOESOMIDAE 



Lorica Vv'ith a mid-ventral split; foot ringed, ver>' re- 

 tractile, projecting ventrally 

 Common genus — Ploesoma 

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