Semivermilia cribrata. A.- Operculum. B.- Thoracic neuropodial hook. C.- First chaetiger capillary notochaetae. D.- First chaetiger limbated notochaetae. E.- Abdominal capillari chaetae. F.- Thoracic limbate notochaetae. G.- Apomatus chaetae. H.- Abdominal capillary chaetae. I.- Typical abdominal chaetae. Scale bars in microns.