On the distinctions between this genus and Planorbis, little need be said. The principal difference consists in the latter having no operculum; but another, and a very remarkable one, (which seems to have escaped all writers,) is, that the shells of the latter genus are destitute of any columella. The Planorbis cornu-arietis of Lamarck, has been removed by Mr. G. Sowerby to this genus. This shell, it is true, appears to be intermediate between one and the other; but the only affinity which it bears to Ampullaria, is in the oval form of the aperture; while it is allied to Planorbis by its discoid form, want of the columella, and being universally described as without an operculum: the preponderance of evidence is clearly in favour of the situation originally assigned to it by Lamarck.
The characters, therefore, given to the genus Ampullaria by Mr. G. Sowerby, will be found incorrect. There was no necessity for explaining, much less for altering, (in this instance,) the masterly definitions of Cuvier and Lamarck. With regard to the second species given by Mr. Sowerby to illustrate this genus, he is no less in error; for the real A. rugosa, of all authors, is a strikingly distinct shell from that which he has figured under this name. This will be sufficiently obvious by referring to the figures either of Lister, Chemnitz, or Lamarck.
Having offered these remarks on a subject to which I have paid some attention, I wish to refrain from pointedly noticing other errors and misconceptions into which Mr. G. Sowerby has fallen; rather wishing that greater experience, and more matured judgment, may lead him to do this himself, prior to the publication of the system of Conchology which he has announced.
GENERAL ALPHABETIC INDEX
OF
LATIN AND ENGLISH NAMES
TO
VOLUME II.
| Pl. | Pl. | ||
| Achatina emarginata | [84] | Mitre, thick | [88] |
| fasciata | [74] | Muscipeta, Gen. Char. | [116] |
| vittata | [84] | barbata | ib. |
| Chesnut-banded | [74] | Natica, Gen. Char. | [75] |
| notched | [84] | effusa | [104] |
| Ribbon | ib. | melastoma | [79] |
| Ampullaria, Gen. Char. | [103] | mustelina | ib. |
| fasciata | ib. | punctata | [104] |
| globosa | [119] | spadicea | [75] |
| Anodon, Gen. Char. | [96] | sordida | [79] |
| rugosus | ib. | banded | [75] |
| Apple-snail, banded | [112] | belted | [79] |
| globular | [119] | brown | ib. |
| Aracari, lettered | [90] | black-mouthed | ib. |
| Bee-eater, black-capped | [76] | spotted | [104] |
| Botis, Gen. Char. | [77] | open | ib. |
| bicolor | ib. | Nectarinia, Gen. Char. | [117] |
| marginata | [77] | cyanocephala | ib. |
| Cinnyris, Gen. Char. | [95] | blue-headed | ib. |
| chalybeia | [95] | Oceanic snail, common | [85] |
| Conus carinatus | [112] | globular | ib. |
| cinctus | [110] | Papilio, Gen. Char. | [92] |
| generalis | [118] | Evander | [101] |
| Princeps | [86] | Harrisianus | [109] |
| pulchellus | [114] | Nox | [102] |
| terebra | [70] | Torquatus | [94] |
| Cone, carinated | [112] | Polymetus | [92] |
| Flambeaux | [118] | Pandrosus | [93] |
| Orange Admiral | [114] | Parrakeet, grey-breasted | [89] |
| Prince | [86] | turcosine | [73] |
| Screw | [70] | Paludina, Gen. Char. | [98] |
| Cowry, Mosaic | [111] | elongata | ib. |
| Courier, black-bellied | [106] | unicolor | ib. |
| Crab-eater, Cinnamon | [67] | carinata | ib. |
| Creeper, lesser-collared | [95] | Picus affinis | [78] |
| Cursorius, Gen. Char. | [106] | Platyrhynchus, Gen. Char. | [115] |
| Temminckii | ib. | cancromus | ib. |
| Cypræa, Gen. Char. | [111] | Pogonias, Gen. Char. | [68] |
| tessellata | ib. | hirsutus | [72] |
| Date-shell, banded | [97] | rubrifrons | [68] |
| grey | ib. | Psittacus murinus | [89] |
| Fly-spot | ib. | pulchellus | [73] |
| Ear-shell, small-holed Cal. | [80] | Pteroglossus inscriptus | [90] |
| Flatbill, short-tailed | [115] | Puff bird, greater pied | [99] |
| Flycatcher, bearded | ib. | River-snail, long-spired | [98] |
| Hairstreak, red-bordered | [69] | olive | ib. |
| Halcyon, cinnamominus | [67] | carinated | ib. |
| Haliotis, Gen. Char. | [80] | Ramphastos dicolorus | [108] |
| Californiensis | ib. | Sphinx, Gen. Char. | [87] |
| Hawk-moth, wild vine | [87] | Ello | [81] |
| Ello | [81] | Labruscæ | [87] |
| Humming-bird, white-tailed | [82] | Strombus dilatatus | [71] |
| sickle-winged | [83] | mutabilis | ib. |
| blue sickle-winged | [107] | little pink-mouthed | ib. |
| recurved bill | [105] | winged | ib. |
| Horsemussel, wrinkled | [96] | Tamatia, Gen. Char. | [99] |
| Ianthina, Gen. Char. | [85] | macrorhynchos | ib. |
| fragilis | ib. | Thecla, Gen. Char. | [69] |
| globosa | ib. | Galathea | ib. |
| Licinia Amphione | [91] | Toucan, yellow billed | [108] |
| Marginella, Gen. Char. | [97] | Tooth-bill, red-fronted | [68] |
| cingulata | ib. | hairy-breasted | [72] |
| faba | ib. | Trochilus, Gen. Char. | [82] |
| prunum | [97] | niger | ib. |
| Merops Savignii | [76] | falcatus | [83] |
| Mitra caffra | [88] | recurvirostris | [105] |
| crassa | ib. | ensipennis | [107] |
| pertusa, var. | [113] | Xenops, Gen. Char. | [100] |
| Mitre Brown, wh. banded | [88] | genibarbis | ib. |
| Cardinal, var. | [113] | whiskered | ib. |