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Show 1 06 MB. E. A. SMITH ON LAND-SHELLS FBOM [Eeb. 5, Var. PALLIDA. Testa typo minor, dilute fusco-cornea. Diam. maj. 16 millim., min. 14, alt. 6. The variety, which was collected at the same locality as the type, consists of the same number of whorls, is similarly sculptured, and has a similar aperture and peristome. With the exception of its small size and paler colour, it agrees perfectly with the typical form. The colour of the latter is a rich purplish red-chestnut above and below. The extreme edge of the keel and the suture are pale, and above and beneath the keel and above the suture a narrow dark spiral line is observable. It differs from T. alexis in colour, the greater width of the whorls, and the much stronger spiral sculpture. 15. TEOCHONANINA WHITEHEADI. (Plate II. figs. 17, 18.) Testa parva, T. paraguensi similis, sed minor, carina acutiore, labio magis sinuoso. Diam. maj. 1 1 | millim., cdt. 5. Hab. N. Borneo (J. Whitehead). This is the smallest of the known Bornean forms. It has all the general characters of T. paraguensis, but may be separated on account of certain slight differences, such as the sharper more compressed keel, somewhat paler colour, and more sinuous basal lip. EYEEETTIA, Godwin-Austen. Nearly all of the species of this genus are exceedingly difficult to distinguish by their shells, and it is quite impossible to determine them from the published descriptions or even the figures. The slightest inaccuracy in outline gives to a figure quite a different appearance from the specimen delineated. It is only by comparison of the type examples that we can determine the species with any degree of certainty, and even under these favourable circumstances it is a task of no mean difficulty. With the exception of E.hyalina (Martens), the types of all the known species from Borneo are in the British Museum, and consequently the determination of a number of forms from that island, acquired within the last two or three years, is to a great extent facilitated. E. bocki, quoted by Godwin-Austen1 as of Issel, is purely imaginary, and is not described at the reference given. 16. EVEEETTIA SUBIMPEEFOEATA. (Plate III. fig. 1.) Testa E. consuli subsimilis, seel minus depressa, solidiuscula, vix perforata, nitidissima, supra et infra tenuissime spiraliter striata, lineisque incrementi obliquis infra suturam confertim plicatis sculpta ; anfractus 6|, convexiusculi, lente et regulariter accrescentes, ultimus rotundatus, infra in medio impressus • apertura oblique lunata, intus opalescens; peristoma tenuissi-mum, margine columellari leviter incrassato, ad insertionem breviter reflexo umbilicum fere tegente. Diam. maj. 26 millim., min. 23, alt. 17. > P.Z.S. 1891. p. 36. |
