196 BULLETIN" 91, UNITED STATES NATIONAL MUSEUM. 



Genus UNGULINA Daudin. 



UNGULINA ALFREDENSIS, new species. 

 Plate 43, figs. 1, 2; plate 54, figs. 1, 10. 



Shell of varying outline, thin. Outer surfaces marked with irregu- 

 lar growth lines and numerous fine papillae, which give the surface a 

 shagreened appearance. The character of the hinge is shown in our 

 detailed sketch. 



There are one complete young specimen and three valves of this 

 species, Cat. No. 187189, in the collection of the United States 

 National Museum, from Port Alfred (Coll. No. 740). I figure the 

 complete individual and the largest valve. The large specimen meas- 

 ures: Altitude, 12.5 mm.; length, 18 mm. The complete specimen 

 measures: Altitude, 7 mm.; length, 8.6 mm. 



Family GALEOMMATIDAE. 

 Genus SCINTILLA Deshayes. 



SCINTILLA TURTONI, new species. 

 Plate 45, fig. 3; plate 49, figs. 4, 5. 



Shell very regularly oval, bluish white, semitranslucent. Umbones 

 a little anterior to the middle. Outer surface marked by strong con- 

 centric lines of growth and exceedingly feeble, microscopic, radiating 

 striations. The hinge is shown in our detailed figure. 



The type and two additional valves, Cat, No. 249887, U.S.N.M., 

 come from Port Alfred (Coll. No. 1159). It measures: Altitude, 6.3 

 mm.; length, 8.5 mm. 



One of these loose valves with the type is somewhat larger, measur- 

 ing: Altitude, 7 mm.; length, 9.5 mm. 



There are two additional lots of this species in the United States 

 National Museum, from Port Alfred, as follows: Cat. No. 187173, two 

 valves (Coll. No. 722); Cat, No. 1S7174, one valve (Coll. No. 723). 



Family SPORTELLIDAE. 

 Genus BASTEROTIA Mayer. 



BASTEROTIA TRICOSTALIS Sowerby. 



Cat. No. 251051, U.S.N.M., contains a valve of this species from 

 Port Alfred (Coll. No. 1568). 



Family LEPTONIDAE. 

 Genus ERYCINA (Lamarck) R^cluz. 



ERYCINA FIRMATA Gould. 



Lepton firmatus Gould, Proc. Boston Soc. Nat. Hist., vol. 8, p. 33, 1861. 



Plate 43, figs. 3, 4; plate 49, figs. 6, 7. 



Shell irregularly triangular, thin, bluish white, the umbones a 

 little posterior to the middle; the posterior dorsal margin sloping 



