NO. 2207. WEST AMERICAN MELANELLID MOLLUSKS—BARTSCH. 343 



SiTROMBIFORMIS FUSCOSTRIGATA Carpenter. 



Plate 46. fig. 1. 

 Eulimafuscostrigata Carpenter, Ann. Mag. Nat. Hist., ser. 3, vol. 14, 1SG4, p. 47, 



Shell broadly conic, polished, tip bro^wTi ; the anterior third between 

 the sutures of each turn and the base of the last turn, dark brown. 

 On the last half of the last turn the brown of the basal portion splits 

 into two bandSj one a little below the periphery and the other mark- 

 ing the extremity. Early whorls strongly rounded, separated by a 

 well impressed suture, the succeeding ones almost fiat with an ill- 

 defined suture. Surface marked by fine lines of growth only. Periph- 

 ery of the last whorl wcaldy angulated. Base somewhat produced, 

 moderately rounded. Aperture ovate; posterior angle acute; outer 

 lip thin; inner lip moderately long, rather stout, curved, revolute, 

 and appressed to the base; parietal wall covered by a moderately 

 thick callus. 



Carpenter's type (Cat. No. 4105, U.S.N.M.) comes from Cape San 

 'Lucas, Lower California. It has 10 whorls and measures — length, 

 4.7 mm.; diameter, 1.3 mm. 



STROMBIFORMIS PANAMENSIS, new species. 



Plate 46, fig. 2. 



Shell elongate-conic, bluish-white, pohshed, mth a narrow pale- 

 browTi band marking the appressed summit of the whorls; half of 

 the space between this dark band and the suture is white; the rest 

 of the whorl is suffused with pale brown; the aperture, too, is edged 

 with pale brown, while the extremity of the base is white. Early 

 whorls shghtly rounded, separated by an impressed suture, the suc- 

 ceeding turns almost flattened, marked by exceedingly fine lines of 

 growth and an occasional retractive varicial line which is not accom- 

 panied with any color markings. The appressed portion of the 

 whorls is dark in color and the anterior limit of the appressed portion 

 appears as a false suture, the true suture being very inconspicuous. 

 Periphery of the last whorl well rounded. Base produced, well 

 rounded. Aperture elongate-ovate, slightly effuse anteriorly; poste- 

 rior angle acute; outer lip thin; inner lip moderatel}' long, curved, 

 reflected and appressed to the ])ase for its entire length; parietal 

 wall covered with a moderately thick callus. 



The type (Cat. No. 215787, U.S.N.M.) was dredged by the United 

 States Bureau of Fisheries steamer Albatross at station 2799 in 29 J 

 fathoms, in Panama Bay, on green mud bottom. It has 11 whorls 

 and measures — length, 6 mm.; diameter, 1.3 mm. 



