OCR Text |
Show 126 MB. E. A. SMITH ON LAND-SHELLS FBOM [Feb. 5, vix incrassatum, marginibus callo tenui junctis, columellari supra regionem umbilicalem fortiter reflexo, callum crassum formante. Longit. 1| millim., diam. I5 ; apertura § longa, k lata. Hab. Banguey Island. The strong callus over the umbilical region is a characteristic feature. There is very little surface-sculpture observable, merely very faint lines of growth and a few minute spiral stria? on the body-whorl, visible only under the microscope. 82. GEOEISSA FLAVESOENS. (Plate IV. fig. 17.) Testa globose turbinata, flavescens, spiraliter striata ; anfractus tres, primus Icevis, globosus, secundus convexiusculus, superne subhumerosus, ultimus magnus, subglobosus; apertura semi-circularis, obliqua, longit. totius h, adcequans ; peristoma leviter incrassatum, marginibus callo tenui junctis, columellari oblique rectiusculo, reflexo, supra umbilicum callum crassiusculum formante. Longit. 1| millim., diam. 1|; apertura lj longa, J lata. Hab. Gomanton, N.E. Borneo. Although spirally sculptured somewhat similarly to G. hosei, this species differs in colour and the less angular penultimate whorl. 83. GEOEISSA BOBNEENSIS. (Plate IV. fig. 18.) Testa imperforata, turbinata, rufescens; anfractus quatuor, convexi, sutura canaliculata sejuncti, oblique striati, primus globosus, Icevis, ultimus antice paulo descendens, ad medium obtuse subangulatus ; apertura parva ; peristoma rufum, intus limbatum, marginibus callo tenui junctis, columellari obliquo, vix arcuato, reflexo. Longit. 2\ millim., diam. fere 2 ; apertura 1 longa, § lata. Hab. Gomanton, N.E. Borneo. This species has no spiral sculpture, but exhibits merely fine stria? of growth. The outer lip is distinctly thickened within and of a bright red colour. EXPLANATION OF THE PLATES. PLATE II. Fig. 1, 2. Xesta themis, p. 100. 3. padasensis, p. 100. 4. thisbe, p. 101. 5,6. Hemiplecta egeria, p. 102. 7. prceculta, p. 101. 8. densa, var. everetti, p. 101. 9. rabongensis, p. 102. 10. Dyakia lindstedti, p. 103. 11. subdebilis, p. 104. 12. Trochonanina heraelea, p. 105. 13,14. alexis, p. 105. 15,16. kina-baluensis, p. 105. 17,18. whitehcadi, p. 106. |