Limapontia senestra. Immature specimens. r: rhinophore. v: vane in front of rhinophore. Dorsal and dorso-lateral pale marks distinct; some coalescing into lines. Uncertain if vane found on populations other than in Fleet lagoon, Dorset. August 2003. Species Limapontia senestra Photographer / copyright holder H.C.Marshall
Limapontia senestra. Mature specimen; r: digitiform rhinophore and slight ridge behind it; b: bulge marks position of bursa copulatrix; c: constriction in metapodium (sometimes). Immature specimen; vane in front of rhinophore. Fleet, Dorset. Aug. 2003. Species Limapontia senestra Photographer / copyright holder H.C.Marshall
Akera bullata. Very large specimens, 60mm and 80mm long, bred in aquarium from wild stock at Oban, Scotland. Species Akera bullata Photographer / copyright holder J.C.A.Craik
Akera bullata. Shell height 31mm. Specimen with spire hardly protruding beyond final whorl. Recently dead with intact orange-brown periostracum, and spiral break in whorls sealed by membrane. Seawater pond, Oban, Scotland. April 2010. Leg. Clive Craik. Species Akera bullata Photographer / copyright holder I.F. Smith
Akera bullata. Height 31mm. Shell thin, flexible, fragile, translucent, with orange-brown periostracum. Only sculpture many fine prosocline growth lines. Aperture almost as long as height. Seawater pond, Oban, Scotland. April 2010. Leg. Clive Craik. Species Akera bullata Photographer / copyright holder I.F. Smith
Akera bullata. Shell height 31mm. Specimen with spire hardly protruding beyond final whorl. Recently dead with intact orange-brown periostracum. Seawater pond, Oban, Scotland. April 2010. Leg. Clive Craik. Species Akera bullata Photographer / copyright holder I.F. Smith
Akera bullata. Thousands of dead shells littering the strandline mixed with dead Zostera. Fleet lagoon, Dorset. April 2012. A feature of this site since at least 1853. Species Akera bullata Photographer / copyright holder Malcolm Storey, www.bioimages.org.uk
Akera bullata. Spire wound round a central cavity instead of solid columella. Fleet lagoon, Dorset. April 2012. (Stacked image). Species Akera bullata Photographer / copyright holder Malcolm Storey, www.bioimages.org.uk