"The bill is very large, compressed sideways, having _a sharp ridge along the upper part_; the upper mandible is green, with a long triangular spot of yellow colour on each side, and the ridge on the upper part yellow; the lower mandible is blue, with a shade of green in the middle, the point is red, it hath about five faint dusky bars, which cross the joinings of the two mandibles. The iris of the eye is a fair green colour; round the eye is a broad space of naked skin of a violet colour: the throat and breast are of a bright yellow, below which is a bar of scarlet feathers; the covert feathers of the tail are white above, beneath of a bright red; the legs and feet are all of a blue or violet colour." Edwards says it was brought from Jamaica, but doubts its being rather a native of the continent: he says they are very rarely brought home alive. The bill is full six inches long, and the whole figure on the same scale, both in this and in Edwards. * * * * * Pl. 46 [Illustration] BULIMUS citrinus, _Citron Bulimus._ * * * * * GENERIC CHARACTER.--See Pl. 4. * * * * * SPECIFIC CHARACTER. _B. testa obovata; spira conica, in medio sub-crassata, apertura longiore: spira anfractibus 6 in suturam depressis; labio exteriore basi subcontracto; umbilico subclauso._ Shell obovate; spire conic, slightly thickened in the middle, longer than the aperture, and of six volutions depressed on the suture; outer-lip slightly contracted at the base; umbilicus nearly closed. Bulimus citrinus, _var._ B. _Bruguiere Encycl. Meth._ 314. _no._ 27. _Martini_ 9. _tab._ 110. _fig._ 930. * * * * * This variable species is perhaps the most beautiful and delicate in its colouring of all the terrestrial snails; yet, although figured by several of the older writers, so little justice has been done it, that we make no apology for introducing it into the present work, both on this account, and for the purpose of giving such a discriminative specific character as may lead to the inquiry, how far all the numerous varieties mentioned by authors really belong to this species or not. As far as my own observation goes, I have found that the thickened spire, the depression of the whorls on the suture, and the narrowness or contraction of the mouth at the base, afford the only constant characters; for, in regard to colour and the situation of the mouth, both appear subject to great variation, the latter being as often reversed as regular. Martini's is the only figure that can be safely quoted for this variety.