Shell very thin, translucid, ovate-oblong, with a conical-pointed spire formed of a small number of whorls; aperture very large, oval, oblique; the edges disunited; the right always acute, the left acute and arched, formed by the columella. Succinea cucullata. S. amphibia. S. oblonga. _S. amphibia._ The amphibious Succinea. Pl. 24, fig. 4. Species elongated, very thin and pellucid; spire short; aperture expanding; amber colour. 10. Auricula. Fourteen species. This genus was so called from the resemblance which the aperture bears to the shape of an ear; many of the species are named from their resemblance to the ears of particular quadrupeds. It is a land-shell, found chiefly in the East and West India Islands. Shell thick, solid, more or less smooth, oval, oblong, spire short and obtuse; aperture entire, oblong, enlarged, ear-shaped, much contracted behind; edges disunited; right lip sometimes thick and outwardly reflected; the left or columella with one or more teeth or thick callous plaits. Auricula Midæ. A. Judæ. A. Sileni. A. leporis. A. felis. A. Dombeiana. A. coniformis. A. scarabæus. A. bovina. A. caprella. A. myosotis. A. minima. A. nitens. A. monile. _A. Judæ._ Judas’s Ear. Pl. 19, fig. 6. Species thick, oblong, conical, with minute decussated striæ and granulations; light brown; two plaits on the columella; right outwardly reflected. _A. scarabæus._ The Beetle’s Ear. Species of which the columella has three plaits, and the whole internal side of the right edge denticulated. _A. myosotis._ The dwarf Auricula. Species minute, with two plaits on the columella, and one tooth behind. _A. Sileni._ Silenus’s Ear. Species very small, without plaits or teeth. 11. Cyclostoma. Twenty-eight species. A terrestrial shell, varying considerably in form, but distinguished by a round aperture, reflected lip, and horny operculum. Shell more or less elevated, volutions rounded, summit papillose; aperture round, the edges united circularly and reflected; the left having its origin very detached from the spire. Operculum calcareous, complete, not spiral; summit sub-central.