Without any tubercles except the eyes, which are neither prominent nor reticulated.
Longitudinal lobes slightly prominent.
Abdomen with 8 articulations.
Genus Fourth. Paradoxides.
Body depressed not contractile.
Flanks much broader than the middle lobe.
Buckler nearly semicircular three transverse furrows on the middle lobe.
Eye-shaped tubercles none.
Abdomen with 12 articulations.
Arches of the lateral lobes, more or less prolonged beyond the membrane which sustains them.