APPENDIX 6 in Shallow-water Rissoidae of the genera Alvania Risso 1826 Haurakia Iredale 1915 Parashiela Laseron 1956 Simulamerelina Ponder 1985 and Subestea Cotton 1944 Gastropoda Caenogastropoda Rissooidea from French Polynesia with the description of a new deep-water genus

APPENDIX 6. — Measurements of teleoconch and protoconch of Alvania prosocostata n. sp. in mm,with range,mean and standard deviation: 1, holotype,Gambier, Taraururoa, 1-3 m; 2-7, paratypes, Gambier, Taraururoa, 1-3 m; 8, 9, Australes, Rapa of Pararaki Bay. Teleoconch123456789Min-maxMeanStdHeight2.051.951.772.001.822.051.901.952.001.77-2.051.940.098Width1.201.201.101.251.171.201.151.171.251.10-1.251.180.047Height/Width ratio1.711.631.611.601.561.711.651.671.601.56-1.711.640.052Aperture height0.900.870.750.870.850.900.870.870.920.75-0.920.860.048Height/aperture height ratio2.282.242.362.302.142.282.182.242.172.14-2.362.240.069No. whorls3.503.253.153.403.203.303.253.403.303.15-3.503.310.110No. axial ribs on last whorls24272225222229?282522-2924.52.56No. spiral cords on last whorls13(6)11(5)?12(7)11(6)14(7)14(7)13(7)11(6)11-14(5-7)12.37 (6.37)1.302 (0.744)(above aperture)Start I. II. VI-VIII, II,VII, II,VII, II,VII, II,VII, II,VII, II,VII, II,VII, II,VIII, II,VIII, II, VII––Protoconch123456789Min-maxMeanStdHeight0.2370.2500.2370.2370.2200.2620.2500.2750.2500.220-0.275 0.2460.016Diameter of nucleus0.1120.1250.1250.1250.1120.1250.1120.1120.1120.112-0.125 0.1170.007Diameter of first half whorl0.2250.2370.2370.2370.2200.2370.2250.2250.2120.212-0.237 0.2280.009Maximun diameter0.3250.3250.3120.2750.2750.3200.3000.3000.3000.275-0.325 0.3040.019No. whorls1.251.251.201.101.201.201.201.201.251.10-1.251.210.046Paucispiralyesyesyesyesyesyesyesyesyesyes––