126 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



The type and two specimens, Cat. No. 187062, U.S.N.M., come from 

 Port Alfred (Coll. No. 600). The type has four postnuclear whorls, 

 and measures: Length, 1.3 mm.; diameter, 1 mm. Cat. No. 250427, 

 U.S.N.M., contains two specimens from Port Alfred (Coll. No. 1300). 



SABANAEA THALIA, new species. 



Plate 6, fig. 6. 



Shell pupiform, with blunt apex, subdiaphanous. Nuclear whorls 

 not differentiated from the later turns; all whorls strongly rounded 

 and appressed at the summit, through which the preceding whorl 

 shines, which gives the whorls the aspect of having a double suture. 

 Spire marked with decidedly retractive lines of growth, and exceed- 

 ingly fine, spiral striations. Sutures moderately constricted. Pe- 

 riphery of the last whorl well rounded. Base moderately long, um- 

 bilicated, well rounded, slightly attenuated anteriorly, marked like 

 the spire. Aperture subcircular, posterior angle obtuse; outer Up 

 thin; inner lip thin, strongly curved, free, slightly reflected over the 

 umbilicus; parietal wall covered with a thick callus, which is free at 

 the edge, and renders the peritreme complete. The type and two 

 specimens, Cat. No. 187058, U.S.N.M., come from Port Alfred (Coll. 

 No. 596). The type has six whorls, and measures: Length, 1.7 mm.; 

 diameter, 0.8 mm. Cat. No. 227742a, U.S.N.M., contains two speci- 

 mens from the same locality (Coll. No. 837), and Cat. No. 227743, 

 U.S.N.M., seven specimens from the same source (Coll. No. 838). 

 In addition to these, we have seen 105 specimens from Port Alfred 

 which have been returned to Colonel Turton (Coll. No. 1594). 



Genus AMPHITHALAMUS Carpenter. 



AMPH1THALAMUS TURTONI, new species. 

 Plate 6, fig. 5. 



Shell very minute, pupiform, pale horn color. Nuclear whorls one 

 and one-half, marked with many, exceedingly fine, spiral striations and 

 lines of growth, the combination of the two lending these whorls an 

 exceedingly finely pitted appearance. Postnuclear whorls rather 

 high between the sutures, appressed at the summit, well rounded, 

 marked by fine, decidedly retractive lines of growth. Sutures 

 strongly constricted. Periphery of the last whorl well rounded. Base 

 attenuated anteriorly, marked like the spire. Aperture oval; outer 

 lip thick within, thin at the edge; inner lip decidedly curved; parietal 

 wall built out to form a shelf, the inner edge of which forms the parie- 

 tal Up of the aperture. 



The type and nine specimens of this species, Cat. No. 187061, U.S. 

 N.M., were collected at Port Alfred (Coll. No. 599). The type has a 

 little more than four whorls, and measures: Length, 1 mm.; diameter, 

 0.5 mm. 



