SOUTH AFRICAN MARINE MOLLUSKS. 51 



larly placed varices and many, very regular, and regularly, closely 

 spaced, slender, raised, axial threads which are about as wide as the 

 spaces that separate them. Spirally the whorls are marked by about 

 16 slender threads, between the sutures, which are a little less 

 strong than the axial markings and also less regular. The spaces 

 inclosed between the axial and spiral threads appear as narrow oblong 

 pits whose long diameter coincides with the spiral sculpture. Sutures 

 well impressed. Periphery of the last whorl well rounded. Base pro- 

 longed, marked like the spire but not as strongly. Aperture strongly 

 channeled anteriorly, posterior angle narrow, obtuse; outer lip thick- 

 ened by a varix, columella sinuous, covered by a strong, decidedly 

 reflected callus which extends up on the parietal wall. 



The type and one other specimen, Cat. No. 187017, U.S.N.M., came 

 from Port Alfred (Coll. No. 551). The type has the last six whorls 

 which measure : Length, 33.5 mm.; diameter, 11.5 mm. 



Family ALECTRIONIDAE. 



Genus ALECTRION Montfort. 



ALECTRION CAPENSIS Dunker. 



The United States National Museum has ten lots of this species, 

 Cat. No. 18164, five specimens from Cape of Good Hope, Cat. No. 

 21756, one collected by Dunker at Algoa Bay. Cat. No. 43022, nine 

 specimens from Cape of Good Hope. Cat. No. 77793, nine from the 

 same locality collected by Layard. Cat. No. 90609, two from Cape 

 of Good Hope. Cat. No. 91459, six from the same place. Cat. No. 

 98013, twelve from Albany. Cat. No. 186755, three from Port 

 Alfred (Coll. No. 116). Cat. No. 186759, one from the same place 

 (Coll. No. 120). Cat. No. 187196, one from the same locality (Coll. 

 No. 65). Cat. No. 272121 U.S.N.M.,two specimens from South Africa. 



ALECTRION CRAWFORDI Sowerby. 



Cat. No. 186754, U.S.N.M., two from Port Alfred (Coll. No. 115). 



ALECTRION KOCHTANA Dunker. 



Cat. No. 21757, U.S.N.M., one specimen collected by Dunker in 

 Algoa Bay. Cat. No. 227764, US.N.M., five specimens from Port 

 Alfred (Coll. No. 859), and Cat. No. 227765, U.S.N.M., two specimens 

 from the same locality (Coll. No. 860), and Cat. No. 250453, U.S.N.M., 

 two from the same place (Coll. No. 1326). 



ALECTRION QUANTULA Gould. 



Gould's type, Cat. No. 224, U.S.N.M., collected by William Stimp- 

 son on the North Pacific Exploring Expedition at Simons Bay, 

 agrees in every way with Nassa poecilosticta Smith. The latter will 

 therefore have to be considered a synonym of Nassa quantula Gould, 

 the present species. Cat. No. 186756, U.S.N.M., contains four speci- 

 mens from Port Alfred (Coll. No. 117). 



