Pl. 136 [Illustration] AMPULLARIA crassa, __Thick Apple Snail_,__Upper and lower figures_. * * * * * GENERIC CHARACTER.--See Pl. 103. * * * * * SPECIFIC CHARACTER. _A. testa globosa, laevi, (sub epidermide) alba, fasciis fuscis ornata; spirae levatae apice obtuso; aperturae margine albo, crasso; umbilico caret._ Shell globose, smooth, beneath the epidermis white with brown bands; spire elevated, tip obtuse; margin of the aperture thick, white; umbilicus none. _Martini_ 9. _t._ 128. _f._ 1135. * * * * * A distinct species, well characterised by the absence of the umbilicus, the situation of which is indicated only by a slight depression: the margin of the aperture all round is thickened, and white; but, from no groove being discernible, I suspect the operculum may be horny. The only specimen I have, is divested of the epidermis; it is obviously an old shell; and appears to agree with the figure of Martini, also taken from an uncoated specimen. * * * * * AMPULLARIA oblonga, _Oblong Apple Snail_ * * * * * _A. testa oblonga, laevi, tenui, fusca; spira levata, crassa, obtusa; aperturae elongatae basi contracta; umbilico vix obsoleto._ Shell oblong, smooth, thin, brown; spire elevated, thick, obtuse; aperture lengthened, base contracted; umbilicus nearly obsolete. * * * * * A rare, and undescribed shell, presenting a singular deviation from the general globose form of the _Ampullariae_. The inner lip is wanting on the upper part of the aperture, and on the lower is thin, white, and reflected over the umbilicus, which is nearly obsolete. Both these shells were in the late Mrs. Bligh's collection, without any _habitat_ being affixed to them. * * * * * Pl. 137 [Illustration] PAPILIO Polybius. * * * * * GENERIC CHARACTER.--See Pl. 92. * * * * * SPECIFIC CHARACTER. _P. alis nigris; anticis maculo albo centrali; posticis dentato-caudatis maculo rubro centrali nervis diviso; abdomine striga laterali; thorace punctis flavis subtus, ornatis._ P. (_Tr. caud._) wings black; anterior with a central spot of white; posterior dentated and tailed, with a central red spot, divided by the nerves; stripe on each side the abdomen and spots on the thorax beneath, yellow. * * * * * An insect neither described nor figured by any author. To my liberal friend, Dr. Langsdorff, I am indebted for the two specimens in my own cabinet, collected by himself in the interior of Minas Geraes, or the Diamond district of Brazil. I am not aware of the insect having been found in any other part of that vast country.