10 (5) Four claws per leg present on anterior three pairs but 

 only three claws per leg on posterior pair; distinct dor- 

 sal plates absent; median cirrus absent . . .Anisonyches diakidius 



10 {9) Four claws per leg present on all legs 11 



11 (10) Median cirrus present; distinct dorsal 



cuticular plates absent Coronarctus tenellus 



11 {10) Median cirrus absent; dorsal cuticular plates present Echiniscus 



(E. quadrispinosus is the only species reported from marine environment.) 



