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Show 334 REV. R. B. WATSON ON MADEIRAN MOLLUSKS. [Apr. 17, characteristics of the genus;" and I went on to ask "Does the Achatina folliculus, Gron., a common European species, belong to this new genus or not ? Surely, had it possessed the generic peculiarities mentioned above, the fact would long ago have been noticed. I have not yet been able to decide the question as regards the M a deiran species identified by Lowe as the Achatina folliculus, Gron." I have at last, through the kindness of M r . T. Vernon Wollaston and Mr. Joao Maria Moniz, been enabled to examine the living animal of the Madeiran species, and have, as I expected, found it to possess the generic features of Lovea as given above. It thus becomes increasingly desirable that some one who has the opportunity would make careful examination of the Achatina folliculus, Gron., in order to ascertain whether it presents these same generic features or not. In the mean time the identification of the Madeiran and the South-European species, based on the undeniable similarity of the shells, must be regarded as doubtful; and I propose for the Madeiran species the name of Lovea wollastoni, of which I have now to present the description. Body. In general form very much like that of Lovea tornatellina, Lowe. Colour. Yellow, towards the tail slightly orange, towards the head with a faint tinge of grey, which is darker towards the end of the tentacles. The sole of the foot is lemon-coloured, which is a little more translucent in front. A very slightly greyer line runs above the edge of the foot in front. Mantle yellow, but a little whiter and less translucent, having a few whitish granules scattered in it. It spreads round and beyond the shell-edge ; but m y specimens had been long in captivity, were dry and unhappy, and thus the mantle was probably less extended than would normally be the case. Tentacles. Upper long, very fine ; lower short. Sides scored with long tubercles, of which those above are long and narrow, stretching from above forwards and downwards ; the others below and behind these first are squarer in shape, and stretch from before obliquely backwards. The head, neck, and tentacles are finely tubercled. The foot is bordered by a narrow line, above which is a fringe of squarish-shaped tubercles. Two close-set and well-marked lines of tubercles run backward from between the tentacles along the neck. Seen from above, the tail ends in an attenuated blunt rounded point; seen in profile, it is abruptly cut off obliquely, the extreme upper corner being occupied by the mucous gland, the opening of which is covered by a flap which, when depressed, almost obscures that feature, but which, when the animal is in full vigour, is elevated into a short, sharp, triangular, projecting point. Mr. Wollaston, in sending m e these specimens, writes that Mr. Moniz " says that he obtained them with great difficultv, and, as usual, in S. Goncalo parish." In that locality alone have I ever found them, among the dead leaves of the Opuntia tuna. |