80 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



size consecutively from the periphery to the umbilical chink. Aper- 

 ture subquadrate; posterior angle obtuse; outer lip thin, showing the 

 external sculpture within; columella short, very oblique, slightly revo- 

 lute, provided with an obsolete fold at its insertion; parietal wall 

 covered with a thin callus. 



The type and another specimen, Cat. No. 249701, U.S.N .M., come 

 from Port Alfred (Coll. No. 973). The type has nine whorls and 

 measures: Length, 4 mm.; diameter, 1 mm. Cat. No. 249699, U.S.N .M., 

 contains two additional specimens from the same locality. (Coll. 

 No. 971). 



TURBONILLA (PYRGISCUS) TINCTA Sowerby. 



Cat. No. 186844, U.S.N.M., contains three specimens from Port 

 Alfred (Coll. No. 211). 



TURBONILLA (PYRGISCUS) MAIA, new species. 

 Plate 14, fig. 3. 



Shell elongate-conic, milk white. Nuclear whorls very small, at 

 least two having their axis at a right angle to that of the succeeding 

 turns, in the first of which they are about one-third immersed. Post- 

 nuclear whorls inflated, strongly rounded, marked by narrow scalari- 

 form, slightly protractive axial ribs, of which 16 occur upon the first 

 and second, 18 upon the third to sixth, 20 upon the seventh, and 26 

 upon the penultimate turn. Upon this they become inflated and 

 somewhat irregular; intercostal spaces about twice, to two and one- 

 half times, as wide as the ribs, marked by strongly incised, spiral lines, 

 of which 5 occur upon the first and second, 6 upon the third, 7 upon 

 the fourth, and 8 upon the fifth and sixth, 13 upon the seventh, while 

 upon the penultimate turn they become exceedingly irregular, both 

 as to width, number, and spacing. Sutures strongly constricted. 

 Periphery of the last whorl inflated, well rounded. Base rather short, 

 well rounded, narrowly umbilicated, marked by the feeble continua- 

 tions of the axial ribs and numerous spiral striations. Aperture oval; 

 posterior angle obtuse; outer lip thin; inner lip decidedly curved; 

 slightly reflected, free ; parietal wall glazed with a thin callus. 



The type, Cat. No. 187049, U.S.N .M., comes from Port Alfred 

 (Coll. No. 587). It has eight and one-half post-nuclear whorls, and 

 measures: Length, 7.1 mm.; diameter, 2.3 mm. Two additional lots 

 are in the collection of the U. S. National Museum, all from Port Alfred. 

 Cat. No. 249698, one specimen (Coll. No. 970). Cat. No. 250373, the 

 tip of a young specimen (Coll. No. 1246). 



TURBONILLA (PYRGISCUS) TEFUNTA, new species. 

 Plate 15, fig. 2. 



Shell elongate-conic, milk white, with a narrow pale yellow band 

 a little posterior to the middle on each whorl. Nuclear whorls decol- 

 lated. Postnuclear whorls slightly rounded, feebly shouldered at the 



