140 Mr. A. Adams 07i some Molluscous Animals tenuato, acutiusculo, ad dextram leviter verso ; apertura subro-tuadato-ovata, intus albida nitente. Long. G, lat. A, alt. 2\ mill. Habitat in regione Matelle Ceylanica. Two specimens were procured by Mr. F. Layard from the Lagalle division of the Matelle district. This is the first species of the genus which has been found in Ceylon. It is related to the European A. fluviatilis, but may at once be distinguished by the elevated radiate ribs which occur at short intervals and, equally with the depressed spaces, are marked longitudinally with the minute ribs at their sides. M. Bourguignat represents Ancylus Baconii as occurring in Bengal. A. Verruca, Bens. (Annals for January 1855), taken by me at Bhimtal, and by Dr. Bacon and myself in Rohilkhund, and which was found by Mr. Theobald in Orissa, is the sole Indian species decidedly known. I strongly suspect that M. Bourguignat^s species is that which was taken by Dr. J. F. Bacon at Henley Park, six miles from the Darling Range, in West Australia. Cheltenham, Dec. 26, 1863. Erratum. — In ' Ann. & Mag. Nat. Hist.' for December 1863, p. 42/, line 11 from top, for "parietal" read " columellar." XVIII. — Notes on some Molluscous Animals from the Seas of China and Japan. By Arthur Adams, F.L.S. &c. " There is in shell-fish something more to consider than their shells,^^ observes wise old Adanson ; and indeed we are all aware that a knowledge of its testaceous envelope is not always suffi-cient to determine the natural position or affinities of a mollusk. I lately placed my genus Scaliola with the " Wentletraps," and associated my Diala with Planaxis; Fenella also fared no better, and was regarded by me as a Pyramidellid. On becoming-acquainted, however, with the animals of those genera, I have been enabled, by means of the 'Annals,^ to refer them to their natural families ; and as any account of these molluscous crea-tures, written down from careful observation on the spot, must be of interest, I have thrown together some of my notes for in-sertion in your Journal. The photographic art may some day be applied to portray the forms of the Mollusca : in the mean-time, accurate drawings should not be despised ; and I trust at some future period to be able to reproduce a few of mine of the mollusks of Japan. Photinula qucesita, A. Ad. P. testa orbiculato-couica, imperforata, spira elatiuscula, regione
BioStor
