ClipArt ETC
"Dissection of snail. T., Short horn; TT., long horn with eye; N., cerebral ganglia; S.G., salivary glands on the crop; F., foot; M., columellar muscle; V.C., visceral coil; O.T., ovotestis; V., ventricle of heart; R. rectum; U., ureter; B.V., blood vessels returning to the auricle from the mantle; A., pulmonary aperture; MA., edge of the mantle." -Thomson, 1916

Dissection

"Dissection of snail. T., Short horn; TT., long horn with eye; N., cerebral ganglia; S.G., salivary…

"Helix. B, the relation of the animal to the shell when extended...a, apex of shell; an., anus; e, eyestalk; f, foot; l, lip of shell; m, edge of mantle, which secretes the shell; r.a., respiratory aperture; t, tentacles." -Galloway, 1915

Helix Snail

"Helix. B, the relation of the animal to the shell when extended...a, apex of shell; an., anus; e, eyestalk;…

"Roman snail (Helix pomatia). Note shell covering visceral hump; p.ap., pulmonary aperture (including anus and opening of ureter); f., the foot; g.ap., genital aperture; m., mouth; e., eye on long horn; s.h., one of short horns." -Thomson, 1916

Roman Snail

"Roman snail (Helix pomatia). Note shell covering visceral hump; p.ap., pulmonary aperture (including…

"Reproductive organs of Helix pomatia. O.T., Ovotestis; H.D., hermaphrodite duct; A.G., albumen gland; F.D., female side of common duct; M.D., male side of common duct; O., oviduct; R.S., receptaculum seminis; M.G., mucus glands; D.S., dart-sac; V.D., vas deferens; FL., flagellum; P., penis; M., retractor muscle of penis; AP., genital aperture." -Thomson, 1916

Snail Reproductive Organs

"Reproductive organs of Helix pomatia. O.T., Ovotestis; H.D., hermaphrodite duct; A.G., albumen gland;…