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"Andrea nivalis, natural size; 2. the same much magnified; 3. spore-case with the torn calyptra; 4. spore-case after the discharge of the spores; 5. columella with a few spores adhering." -Lindley, 1853

Andrea nivalis

"Andrea nivalis, natural size; 2. the same much magnified; 3. spore-case with the torn calyptra; 4.…

"Rhizopus nigricans. A, Young sporangium, showing columella within; B, older sporangium, with the wall removed, showing ripe spores covering the columella; C, D, views of the collapsed columella after dissemination of the spores." -Gager, 1916

Bread Mold Stages

"Rhizopus nigricans. A, Young sporangium, showing columella within; B, older sporangium, with the wall…

"Vertical section of the shell of a species of Helix. M., Mouth of shell; A., apex; C., columella." -Thomson, 1916

Shell

"Vertical section of the shell of a species of Helix. M., Mouth of shell; A., apex; C., columella."…

"Spindle-shell (Fusus colus). Fusus: a genus of gastropodus mollusks having a fusiform shell with a canaliculated base, an elongated spire, a smooth columella, and the lip not slit." -Whitney, 1911

Spindle Shell

"Spindle-shell (Fusus colus). Fusus: a genus of gastropodus mollusks having a fusiform shell with a…

"A, Schematic longitudinal section through a zooid and bud of Stylophora digitata. In A, B, and C the thick black lines represent coenosarc; col, columella; T, tabulae. B, similar section through a single zoooid and bud of Astroides calicularis. C, similar section through three corallites of Lophohelia prolifera. ez, edge-zone. D, Diagram illustration the process of budding by unequal division. E, section through a dividing calicle of Mussa, showing the union of two septa in the plane of division, and the origin of new septa at right angles to them." — The Encyclopedia Britannica, 1910

Stylophora Digitata

"A, Schematic longitudinal section through a zooid and bud of Stylophora digitata. In A, B, and C the…