Text-book of comparative anatomy v.2, 1896, Volume 2

adductor ambulacral anal Antedon anteriorly anus apical system appendages arms artery auricle basals base becomes blood body cavity branchial buccal calcareous cells cephalic Cephalopoda cerebral Chitonida ciliated cœlom commissure connected ctenidia ctenidium Decapoda developed digestive gland Diotocardia disc dorsal duct Echinoidea ectoderm edge epithelium fibres foot furrow ganglia ganglion Gastropoda genital aperture gills glandular gonad groove hermaphrodite hind-gut inner integument interradial intestine kidney lamella Lamellibranchia larva lateral layer lies lobes longitudinal madreporite mantle cavity mantle fold median Mollusca Monotocardia mouth musculature nephridium nerve nervous system oesophagus Opisthobranchia oral organs outer paired pallial complex papillæ pedal pericardium pharynx plates pores portion posterior posteriorly proboscis Prosobranchia Pulmonata radial radula rectum renal respiratory ring rows rudiment runs sensory shell side sinus siphon stone canal surface symmetrical tegmen tentacles transverse tube tube-feet vascular system ventral ventricle vesicle vessels visceral dome water vascular water vascular system Zool