SOUTH AFRICAN MARINE MOLLUSKS. 



87 



ately long, narrowly umbilicated, well rounded, marked by the feeble 

 continuation of the axial ribs, and numerous spiral striations Aper- 

 ture oval; posterior angle obtuse; outer lip rather thick; inner lip 

 decidedly curved, and somewhat reflected, provided with a very 

 strong, oblique fold at its insertion; parietal wall covered by a thick 

 callus, which renders the peritreme practically complete. 



The tvpe, and another specimen, Cat. No. 249693, U.S.N.M., come 

 from Port Alfred (Coll. No. 965) ; the type has five postnuclear whorls, 

 and measures: Length, 4 mm.; diameter, 1.9 mm. 



ODOSTOMIA (MIRALDA) AGANA, new species. 

 Plate 19, fig. 8. 



Shell conic, white. Nuclear whorls, at least two, deeply, obliquely 

 immersed in the first of the succeeding turns, above which the tilted 

 edge of the last volution projects. Postnuclear whorls moderately 

 rounded, shouldered at the summit, ornamented with slender, pro- 

 tractive, axial ribs, of which 16 occur upon the first and second, 18 

 upon the third, and 22 upon the penultimate turn. These ribs 

 extend prominently to the summit of the whorls, which they render 

 crenulated. In addition to the axial sculpture the whorls are marked 

 by two prominent spiral cords between the sutures, of which the 

 first occupies the middle of the turns, while the second is halfway 

 between this and the suture. The intersections of the axial ribs 

 and the spiral cords form well-rounded nodules. Periphery of the 

 last whorl marked by a sulcus. Sutures strongly constricted Base 

 moderately long, somewhat produced, narrowly umbilicated, pro- 

 vided with a strong spiral cord, which bounds the peripheral sulcus 

 The anterior part of the base is smooth, excepting rnrnute lines ot 

 growth, which are also apparent on the spire. Aperture oval; outer 

 Hp very thin, showing the external sculpture within, decidedly sinuous 

 at the edge; inner lip strongly curved, slightly reflected, free, pro- 

 vided with a strong fold at its insertion; parietal wall glazed with a 



thin callus. . ., , 



The type, Cat. No. 186848a, U.S.N.M., comes from Port Alfred 

 (Coll No 215a) It has 5 postnuclear whorls, and measures : Length, 

 2.4 mm. ;" diameter, 1 mm. Cat. No. 227728, U.S.N.M., contains three 

 specimens from the same locality (Coll. No. 823). 



ODOSTOMIA (MENESTHO) CARIFA, new species. 

 Plate 18, fig. 5. 

 Shell very small, subcylindric, cream yellow. Nuclear whorls well 

 rounded, smooth, deeply, obliquely inserted in the first of the succeed- 

 in^ turns, above which the tilted edge of the last volution only pro- 

 jects. Postnuclear whorls strongly rounded, appressed at the summit, 

 marked by two strongly incised, spiral grooves, of which the first is 



