Fig. 2 a –d in 3D-microanatomy and histology of the hydrothermal vent gastropod Lurifax vitreus Warén & Bouchet, 2001 (Heterobranchia: Orbitestellidae) and comparisons with Ectobranchia

Fig. 2 a –d Mantle cavity development to posterior. a 3Dreconstruction of mantle cavity and surrounding organs. b Anterior part of mantle cavity. c middle part of mantle cavity. d posterior part of mantle cavity. at atrium. cf Ventral ciliated fold, cr dorsal ciliated ridge, e eye, gd gonoduct (for separation of the different gland epithelia see Fig. 4), ge granular epithelium, k kidney, mc mantle cavity, oe oesophagus, pc pericard, ph pharynx, pmg pigmented mantle gland, ppg posterior pedal gland, r radula, re rectum, sg salivary glands, st stomach, ve ventricle, vn visceral nerve