Note 31 — Chapter II · CRUSTACEA (CONTINUED): ENTOMOSTRACA—BRANCHIOPODA—PHYLLOPODA—CLADOCERA—WATER-FLEAS
Reading edition
Simocephalus vetulus anchors itself to weeds, etc., by a modified seta on the exopodite of the second antenna. It does not employ a dorsal organ for purposes of fixation. [G. S.]