SOUTH AFRICAN MARINE MOLLUSKS. 119 



spiral cord which is a little less strong than those occurring on the 

 spire. Base short, almost flattened, marked with lines of growth 

 and exceedingly fine, spiral striations. Aperture irregular, subquad- 

 rate, somewhat effuse at the junction of the basal wall with the outer 

 lip; posterior angle obtuse; outer lip very thin, rendered sinuous by 

 the external sculpture, which is shown within by transmitted light; 

 columella very slender, decidedly curved, and slightly reflected over 

 and appressed to the base; parietal wall cohered with a thin callus. 



The type and seven additional specimens, Cat. No. 193, U.S.N. M., 

 were collected by William Stimpson on the North Pacific Exploring 

 Expedition at Simons Bay. The type has 14^ whorls, and meas- 

 ures: Length, 20.5 mm.; diameter, 5.8 mm. 



TURRITELLA KOWIENSIS Sowerby. 



Four lots of this species are in the collection of the United States 

 National Museum, all from Port Alfred. Cat. No. 186809, one speci- 

 men (Coll. No. 175). Cat. No. 187038, two specimens (Coll. No. 575). 

 Cat. No. 187039, two specimens (Coll. No. 576). Cat. No. 250405, 

 one specimen (Coll. No. 1278). 



TURRITELLA CAPENSIS Krauss. 



Cat. No. 19317, U.S.N.M., one specimen labeled South Africa 

 without specific locality designation. 



TURRITELLA KNYSNAENSIS Krauss. 



Cat. No. 192, U.S.N.M., two specimens collected by William 

 Stimpson on the North Pacific Exploring Expedition at Simons 

 Bay. 



TURRITELLA, species.? 



Cat. No. 187041, U.S.N. M., one specimen too poor to be positively 

 determined, from Port Alfred (Coll. No. 578). 



TURRITELLA, species.? 



Cat. No. 250397, U.S.N.M., contains the type of a young, very 

 slender, white species from Port Alfred, which we are unable to 

 identify (Coll. No. 1270). 



Family LITTORIN1DAE. 



Genus LITTORINA Ferussac. 



LITTORINA AFRICANA Philippi. 



Cat. No. 18822, U.S.N.M., 3 specimens from Natal. Cat. No. 



189478, U.S.N.M., 110 specimens from Cape of Good Hope. Cat. No. 



189479, U.S.N.M., 8 specimens from the same locality. Cat. No. 

 186811, U.S.N.M., 6 specimens from the same place (Coll. No. 177). 

 Cat. No. 187092, U.S.N.M., 2 specimens from Port Alfred (Coll. No. 

 636). 



