FIGURE 19 in Sabellid worms from the Patagonian Shelf and Humboldt Current System (Annelida, Sabellidae): Phyllis Knight-Jones' and José María Orensanz's collections

FIGURE 19. Perkinsiana assimilis (McIntosh, 1885). A) Anterior thoracic segments, dorsal view, B) same, ventral view, C) same, lateral view, D) anterior peristomial ring, dorsal view, E) Collar, ventral view, F) anterior peristomial ring and faecal groove, G) posterior end, H) entire body. Scale bars: A, B, D 3 mm, C 2.5 mm, E, F 1.5 mm, G 2 mm, H 5 mm. Abbreviations: apr anterior peristomial ring, fg faecal groove, vs ventral sacs, vsc ventral shield of chaetiger 1. Specimen: A–H UANL 8078.