FIGURE 19. Preserved body of Thieleella kelseyi. 421 m, 2.3 miles 48˚T to S Pt. Light, Santa Rosa Island, California, 33. 850˚ N, 120. 183˚ W (LACM 23129). A. Operculum. Scale bar = 1 mm. B. Entire preserved body, hexamethyldisilizane treated. Scale bar = 1 mm. C. Ventral view of anterior portion. Scale bar = 1 mm. D. Ventral view of anterior epipodial tentacles plus ESO. Scale bar = 200 µm. E. Dorsal view of epipodial tentacles and ESO; note biserial papillation of epipodial tentacles. Scale bar = 200 µm. F. Mantle tentacle at posterior end of mantle enlarged. Scale bar = 100 µm. G. Overview of gill and mantle. Fat arrow: direction of view of H. Scale bar = 1 mm. H. Bursicles with openings. Scale bar = 100 µm. Abbreviations: act: accessory cephalic tentacle. b: bursicle. bo: bursicle opening. ct: cephalic tentacle. es: eyestalk. ESO: epipodial sense organ. et: epipodial tentacles. gf: gill filaments. j: jaw. mp: metapodium. mt: mantle tentacle. oaf: operculum attachment flap. op: operculum. opg: opening of propodial gland. pp: propodium. rp: rectal papilla. sn: snout. st. suboptic tentacle.