40 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



The type, Cat. No. 127a, U.S.N.M., has four whorls and measures: 

 Length, 6.8 mm., diameter, 3.5 mm. It was collected by William 

 Stimpson on the North Pacific Exploring Expedition in Simons Bay. 



This may be the shell that has been listed as MargineUa bulbosa 

 Reeve, from South Africa. M. bulbosa Reeve is an inflated form 

 with less elevated spire and comes from Borneo. Cat. No. 17307, 

 U.S.N .M., comes from Cape of Good Hope. Three additional lots, 

 all from Port Alfred, are in the collection of the United States National 

 Museum. Two, Cat. No. 249670 (Coll. No. 942). One, Cat. No. 

 250331 (Coll. No. 1204), and one, Cat. No. 250324 (Coll. No. 1197). 



MARGINELLA CYLINDRICA Sowerby. 



Cat. No. 186721, U.S.N.M., one specimen from Port Alfred (Coll! 

 No. 80). Cat. No. 250325, U.S.N.M., one specimen from the same 

 locality (Coll. No. 1198). 



MARGINELLA FALLAX Smith. 



Cat. No. 186723, U.S.N.M., three specimens from Port Alfred 

 (Coll. No. 82). 



MARGINELLA LEPTA, new species. 

 Plate 21, fig. 3. 



Shell elongate-oval, semitransparent, white. Spire short, broadly 

 conic. Suture well impressed. Surface polished, marked only by 

 exceedingly fine lines of growth. Aperture gradually increasing in 

 width from the posterior angle anteriorly; outer lip thin, not denticu- 

 lated. Columella curved, with a moderately thick callus which is 

 provided with six oblique folds, the second of which is the strongest, 

 the first follows in succession of strength and borders the anterior 

 edge of the columella; the four remaining decrease in size and spacing 

 from the third to sixth. 



Two specimens of this species, Cat. No. 249673, U.S.N.M., come 

 from Port Alfred. (Coll. No. 945.) One of these, the type, measures : 

 Length, 5.1 mm.; diameter, 2.6 mm. 



MARGINELLA DTJLCIS Smith. 



Cat. No. 186725, U.S.N.M., five specimens from Port Alfred (Coll. 

 No. 84). 



MARGINELLA BURNUPI Sowerby. 



Cat. No. 186719, U.S.N.M., three specimens from Port Alfred 

 (Coll. No. 78). Cat. No. 249671, U.S.N.M., contains another speci- 

 men from the same place (Coll. No. 943). 



MARGINELLA DIFFERENS Smith. 



Cat. No. 186720, U.S.N.M., three specimens from Port Alfred (Coll. 

 No. 79). 



