SOUTH AFRICAN MARINE MOLLUSKS. 7 



Three additional lots from the same locality are in the United States 

 National Museum. Cat. No. 227803, 10 specimens from Port Alfred 

 (Coll. No. 898). Cat. No. 227806, three young individuals (Coll. No. 

 901). Cat. No. 250581, a very young individual (Coll. No. 1454). 



Family RINGICULIDAE. 

 Genus RINGICULA Deshayes. 



RINGICULA TURTONI, new species. 

 Plate 1, fig. 4. 



Shell subovate, polished, white. The nucleus consists of a single 

 turn, which has the same outline as the succeeding whorls but lacks 

 their sculpture, being smooth and shining. Post-nuclear turns greatly 

 inflated, separated by strongly marked sutures and ornamented by 

 deeply incised spiral grooves, of which four appear on the spire of 

 each whorl in the type. In addition to these spiral grooves, the 

 whorls are marked at irregular intervals by moderately strong lines 

 of growth, between which there are many microscopic, axial, wavy 

 lines. Periphery and base of the last whorl well rounded, marked by 

 the same vertical sculpture as the spire and at least three spiral 

 grooves, the anterior half being covered by a thick callus. Aperture 

 auriculate, strongly channeled anteriorly; outer lip very much thick- 

 ened, provided with a low denticle on the middle of the inner edge; 

 columella very stout, covered by a heavy callus, which is reflected 

 over the basal part of the shell, armed with two equally strong, oblique 

 folds, the anterior of which is at the anterior edge and the other 

 about halfway between this and the insertion of the columella; parietal 

 wall covered with a very strong callus, which reaches posteriorly over 

 half of the spire of the last turn and forms a strong elongated den- 

 ticle which apposes the denticle of the outer lip. 



The type has six whorls and measures: Length, 4.7 mm. ; diameter, 

 3 mm. 



The two additional specimens have three and five spiral grooves 

 on the spire and four and six, respectively, on the base. They were 

 collected at Port Alfred, Cape Colony, and form Cat. No. 187050, 

 U.S.N.M. (Coll. No. 588). Another specimen from the same locality 

 is listed as Cat. No. 250586 U.S.N.M. (Coll. No. 1459). 



The nearest relative to this species appears to be Ringicula doliaris 

 Gould, the type of which, Cat. No. 1692, U.S.N.M., was collected by 

 William Stimpson at Hakodadi, Japan. This, however, is a much 

 larger species. The type, which has six whorls, measures: Length, 

 5.3 mm.; diameter, 3.6 mm. 



RINGICULA AFRICANA, new species. 

 Plate 33, fig. 4. 



Shell ovate, milk white; spire decidedly elevated. Whorls strongly 

 rounded and feebly shouldered at the summit; the first and second 



