COCHLICELLA. One of the sub-genera into which De Ferrusac has divided the genus Helix, consisting of Bulinus decollatus, fig. 279, and similar species. See Helix. COCHLICOPA. Fer. A sub-genus of Helix, partly corresponding with Polyphemus of De Montfort, and consisting of species of Achatina, which have the outer lip undulated. COCHLITOMA. Fer. A sub-genus of Helix, corresponding with the genus Achatina, Auct. not including those with undulated outer lips. COCHLODINA. Fer. A sub-genus of Helix, including the genus Clausilia, Auct. COCHLODONTA. Fer. A sub-genus of Helix, containing Pupa Uva, Auct. &c. COCHLOGENA. Fer. A sub-genus of Helix, containing pupiform shells, such as Azeca tridens, fig. 290. COCHLOHYDRA. Fer. A sub-genus of Helix, composed of the genus Succinea, Auct. COCHLOSTYLA. Fer. A sub-genus of Helix, composed of the genus Bulinus, Auct. COLIMACEA. Lam. This Family, of the order Trachelipoda, Lam. includes all land shells, which might with propriety be divided into three sections, the first of which contain the following well-known genera:-- 1. SUCCINEA. Oval, transparent, oblique; animal amphibious. Fig. 265, 266. 2. HELIX. The type of which is the common snail shell. The separation of _Carocolla_, on account of the angulated whorls, or that of _Geotrochus_, on account of the turbinated shape, cannot be well maintained. Fig. 264, 267, 268, 273 to 276, 278 to 281, 294. 3. ANOSTOMA. The aperture turned up towards the spire. Fig. 271, 272. 4. STREPTAXIS. Whorls excentric. Fig. 269, 270. 5. BULINUS. Oval; aperture entire, including _Bulimulus_, _Balea_, _Cionella_, _Azeca_. Fig. 282 to 285, 289, 290, 296. 6. ACHATINA. A notch terminating the columella. Fig. 286 to 288. 7. PUPA. Cylindrical; including _Vertigo_, _Alæa_, &c. Fig. 291 to 293. 8. CLAUSILIA. Cylindrical, with a clausium. Fig. 295. _Obs._ The above are united in the system of De Ferrusac under the generic name Helix, and divided into sub-genera as explained under that word. The next section, included in the family Auriculacea, Bl., contains the genera Auricula, Chilina, Carychium, Marinula, Scarabæus, and Partula. Fig. 297 to 302. The third section contains the following genera of land shells with opercula. 1. CYCLOSTOMA. Aperture round; operculum spiral. Fig. 303, 304. 2. NEMATURA. Last whorl contracted; operculum spiral. Fig. 305. 3. HELICINA. Aperture semi-lunar or angulated; operculum concentric. Fig. 306, 307. 4. PUPINA. Shell polished; operculum concentric; aperture round. Fig. 524. 5. STROPHOSTOMA. Aperture turned up towards the spire, like Anostoma, but said to have an operculum. Only known fossil. Fig. 97.