SOUTH AFRICAN MARINE MOLLUSKS. 137 



CREPIDULA LENTIGINOSA Sowerby. 



Cat. No. 98051, U.S.N.M., three specimens from Albany. Cat. 

 No. 19173, U.S.N.M., one specimen from Port Elizabeth. Cat. No. 

 186826a, U.S.N.M., one specimen from Port Alfred (Coll. No. 192). 

 Cat. No. 249786, U.S.N.M., four specimens from the same locality 

 (Coll. No. 1058). 



Family LAMELLARIIDAE. 



Genus LAMELLARIA Montagu. 



LAMELLARIA PERSPICUA Linnaeus. 



One specimen, Cat. No. 250530, U.S.N.M., from Port Alfred (Coll. 

 No. 1403). Cat. No. 250532, U.S.N.M., one young specimen from 

 the same place (Coll. No. 1405). Cat. No. 249768, U.S.N.M., three 

 young specimens from the same locality (Coll. 1040). 



Family NATICIDAE. 

 Genus NATICA Seopoli. 



NATICA IMPERFORATA Gray. 



Cat. No. 98024, U.S.N.M., twelve specimens from Kassouga, 

 Albany. Cat. No. 21800, U.S.N.M., one specimen from Algoa Bay. 

 Cat. No. 186829, U.S.N.M., three specimens from Port Alfred (Coll. 

 No. 195). 



NATICA STIMPSONI, new species. 

 Plate 13, figs. 5, 8, 11. 



Shell large, subglobose, imperforate, bluish white, speckled with 

 numerous dots of brown over the entire surface, excepting a narrow 

 band on the shoulder of the whorls and another a little anterior to the 

 periphery, which are marked by a series of quite regularly spaced tri- 

 angles, the apexes of which point forward. The whorls are inflated, 

 slopingly shouldered at the summit, the rest well rounded, marked by 

 numerous strong lines of growth, and fine spiral lirations. Periphery 

 and base of the last whorl well rounded, marked like the spire. Aper- 

 ture large, oval ; outer lip thin ; inner lip thick, curved and strongly 

 reflected over the umbilical area; parietal wall covered with a very 

 thick callus, having a notch a little nearer the posterior angle of the 

 aperture than its junction with the inner lip. 



The type, Cat. No. 93, U.S.N.M., was collected by William Stimpson 

 on the North Pacific Exploring Expedition at Simons Ba} T , Cape 

 of Good Hope. It has five and one-half whorls, and measures: 

 Length, 38.5 mm.; diameter, 36 mm. 



NATICA, species? 



Cat. No. 187082, U.S.N.M., three poor specimens from Port Alfred 

 which I am unable to refer to any known form (Coll. No. 624). Cat. 

 No. 249750, U.S.N.M., contains two additional specimens, in an 

 equally poor condition, from the same place (Coll. No. 1022). 



