SOUTH AFRICAN MARINE MOLLUSKS. 77 



TURBONILLA (PYRGOLAMPROS) ANGEA, new species. 

 Plate 9, fig. 3. 



Shell elongate-conic, brownish yellow. (Nuclear whorls decollated.) 

 Postnuclear whorls very slightly rounded, feebly shouldered at the 

 summit marked by rather broad, low, somewhat protractive axial 

 ribs, of which 16 occur upon the second, 18 upon the third to fifth; 

 20 upon the sixth; and 22 upon the penultimate turn. These ribs 

 are about double the width of the spaces that separate them. In 

 addition to the ribs, the whorls are marked by exceedingly fine, 

 microscopic, spiral striations. Periphery of the last whorl well 

 rounded. Base moderately long, well rounded, crossed by the ver}^ 

 feeble continuations of the axial ribs and exceedingly fine, spiral 

 striations. Aperture oval; posterior angle acute; outer lip thin; 

 inner lip very short, slightly revolute and appressed, provided with a 

 weak fold at its insertion; parietal wall glazed with a thin callus. 



The type and another specimen, Cat. No. 186844a, U.S.N.M., come 

 from Port Alfred (Coll. No. 211). The type has seven and one-half 

 postnuclear whorls, and measures: Length, 5 mm.; diameter, 1.7 mm. 

 Cat. No. 250375, U.S.N.M., contains three specimens from the same 

 locality (Coll. No. 1248). 



TURBONILLA (PYRGISCUS) HELENA, new species. 

 Plate 14, fig. 1. 



Shell small, elongate-conic, golden brown. Nuclear whorls, at least 

 two, forming a depressed helicoid spire which is obliquely immersed 

 in the first of the succeeding turns, above which a portion of the last 

 two whorls only projects. Postnuclear whorls strongly, tabulatedly 

 shouldered at the summit, well rounded, somewhat constricted at the 

 sutures, marked by very regular, slightly retractive, axial ribs, which 

 are almost as wide as the spaces that separate them. Of these ribs, 

 there are about 24 on the first and second, 22 upon the third, 26 upon 

 the fourth, 30 upon the fifth, and 32 upon the penultimate whorl. 

 The ribs render the summit of the whorls crenulated. Intercostal 

 spaces strongly impressed, marked by numerous fine, equal, and 

 equally spaced, spiral striations, of which about 30 occur between the 

 sutures on the penultimate turn. Sutures very strongly constricted, 

 base moderately long, well rounded, marked by the continuations of 

 the axial ribs, which become enfeebled as they approach the umbilical 

 chink, and incised, spiral lines equaling those on the spire in spacing 

 and strength. Aperture oval, posterior angle rendered decidedly 

 obtuse by the shoulder at the summit. Outer lip thin, showing the 

 external sculpture within; inner lip strongly curved, reflected over 

 and appressed to the base, provided with a weak, oblique fold at its 

 insertion. Parietal wall covered by a thin callus. 



