Structural and Systematic Conchology: an Introduction to the Study of the Mollusca...

adductor Albers Animal anteriorly aperture apex beaks Brachiopoda byssus callus Carboniferous cardinal teeth cartilage cartilage-pit central Chemn columella columellar lip compressed conical Conr Conrad convex Cret Cretaceous d'Orb depressed Desh Devonian Distr.-3 sp Distr.-Fossil dorsal valve edentulous elongated Eocene epidermis equivalve Europe foot Fossil front furrows gaping genus gills Gray groove Helix hinge hinge-line hinge-plate hinge-teeth imperforate inequilateral inequivalve internal lamellæ last whorl lateral teeth left valve ligament ligament external Linn longitudinal mantle margin Miocene muscular impressions muscular scar narrow oblique obtuse Oolite orifice outer lip ovate pallial line simple palpi Paris Basin perforated peristome simple Philippines plate plicate posterior posteriorly prominent radula right valve rounded Shell Shell oblong Shell oval Shell thin side Silur Silurian sinus siphons slightly smooth Sowb species spiral spire striæ striated surface tentacles thick thickened tooth transverse triangular truncated umbilicated umbilicus umbones United ventral valve ventricose West Indies whorls