_Dorsal surface_ (_Of zooecium_ or _polypide_) the surface nearest the mouth; (_of statoblast_) the surface furthest from that by which the statoblast is attached to the funiculus during development. _Ectocyst_ The outer, structureless layer of the zooecium. _Emarginate_ Having a thin or defective triangular area (of a zooecium) in the ectocyst at the tip. _Endocyst_ The inner, living (cellular) layer of the zooecium. _Epistome_ A leaf-like ciliated organ that projects upwards and forwards over the mouth between it and the anus. _Funiculus_ A strand of tissue joining the alimentary canal to the endocyst. _Furrowed_ Having a thin or defective longitudinal (of a zooecium) linear streak in the ectocyst on the dorsal surface. _Gizzard_ A chamber of the alimentary canal situated at the cardiac end of the stomach and provided internally with a structureless lining. _Intertentacular organ_ A ciliated tube running between the cavity of the zooecium and the external base of the lophophore. _Keeled_ Having a longitudinal ridge on the dorsal (of a zooecium) surface. _Lophophore_ The tentacles with the base to which they are attached. _Marginal processes_ Chitinous hooked processes on the margin (of statoblast). of the swim-ring (_q. v._). _OEsophagus_ That part of the alimentary canal which joins the mouth to the stomach. _Orifice_ The aperture through which the lophophore can be protruded from or retracted into the zooecium. _Parietal muscles_ Transverse muscles running round the inner wall of the zooecium. _Parieto-vaginal_ Muscles that surround the orifice, running _muscles_ between the folds of the zooecium in an oblique direction. _Polyparium_ The whole body of zooecia and polypides which are in organic connection. _Polypide_ The tentacular crown, alimentary canal, and retractor muscles of a polyzoon-individual. _Pyloric portion_ That part which communicates with the (of the stomach). intestine.