GUDE: ON THE GENUS STREPTAXIS AND ITS ALLIES. 231 
Obba Cypsele, Pfr.: Malak. Blatt., vol. ii (1856), p. 136, No. 1220. 
Streptaxis Cypsele, Mart.: Malak. Blitt., vol. xv (1868), p. 180; 
Tryon, Man. Conch., ser. m, vol. i (1885), p. 68, pl. xvi, 
figs. 98, 99. 
Alcidia Cypsele, Bourg.: Moll. Afr. équat., 1889, p. 47. 
Hab.—Brazil. 
Section IV. Szrrzumarorsis, J. Mabille. 
J. Mabille: Bull. Soc. Malac. Fr., vol. iv (1887), p. 182. 
Shell having the last whorl strongly compressed below ; aperture 
vertical, oval, contracted by the outer margin, which is grooved, raised 
in the middle, and terminated by a slight slope which unites with the 
columellar margin ; columella curved, widely dilated, callous. 
154. Srreptaxis Porrtert, J. Mabille. 
Stremmatopsis Poirieri, Mab.: Bull. Soc. Malac. Fr., vol. iv (1887), 
p. tol, pl. i, ties. Lo, 16. 
Hab.—Tonkin. 
Section V. JuperrvreaTiA, Martens. 
Martens: Mittl. Zool. Samml. Mus. Naturk. Berlin, vol. i (1898), 
p- 12. Shell pale yellowish-grey, regular, depressed conoid, with 
prominent radial sculpture and open umbilicus; aperture tooth- 
less, with distinctly reflected margin, the basal margin projecting 
in the middle. 
155. Srrepraxis constans, Martens. 
Streptaxis (Imperturbatia) constans, Mart.: Mittl. Zool. Samml. Mus. 
Naturk. Berlin, vol. i (1898), p. 11, pl. ui, fig. 5; Wiegmann, 
tom. cit., p. 48, with figures (anat.). 
Hlab.—Seychelles: Mahé. 
155a. Var. Stnnovrttz, Martens. 
Streptaxis (Imperturbatia) constans, var. Silhouette, Mart.: Mittl. 
Zool. Samml. Mus. Naturk, Berlin, vol. 1 (1898), p. 12. 
Hab.—Seychelles: Silhouette. 
156. Srrepraxts vroLascens, Martens. 
Streptaxis (Imperturbatia) violascens, Mart.: Mittl. Zool. Samml. Mus. 
Naturk. Berlin, vol. i (1898), p. 12, pl. ui, fig. 7. 
Hab.—Seychelles: Mahé. 
157. SrrepraxIs PERELEGANS, Martens. 
Streptaxis (Imperturbatia) perelegans, Mart.: Mittl. Zool. Samml. Mus. 
Naturk. Berlin, vol. i (1898), p. 12, pl. ii, fig. 6. 
Hab.—Seychelles: Mahé. 
158. Srrepraxis Braveri, Martens. 
Streptaxis (Imperturbatia) Brauert, Mart.: Mittl. Zool. Samml. Mus. 
Naturk. Berlin, vol. i (1898), p. 18, pl. ii, fig. 8; Wiegmann, 
ib., p. 49, with figures (anat.). 
VOL. V.—ocToBER, 1902. 16 
