OF CONCHOLOGY. 289 



rounded, the last about one-third the length of the shell, 

 rounded at base ; suture well impressed ; aperture ovate, some- 

 what oblique; lip continuous, attached to the penultimate 

 whorl a short distance, slightly refiexed over the umbilicus ; 

 no distinct umbilical channel. 



The above two species, together with R. costata (Pease) and 

 B. Tahitensis (Pease), form a group, distinct in being ribbed 

 longitudinally. Their operculum is, however, of the usual 

 generic form. 



5. Eealia l^evis. Pease. 



Description. — T. conico-ovata, solidiuscula, laevis, fusco- 

 cornea, anguste umbilicata ; anfr. 5, convexis, transversim 

 sub lente minutissim^ striatis, ultimo 1-2 longitudinis testae 

 suboequans, sub-ventricoso, ad peripheriam obsolete angulato, 

 fascia pallide straminea cingulo ; apertura elongato-ovata, 

 posteriore acute angulata ; perist. continuo, simplici ; sutura 

 umbilicali an2;usta, costa circumambiente finita. 



Dimensions. — Long. 5, diam. 3 mill. 



Shell conically ovale, rather solid, smooth, brownish horn- 

 color, narrowly umbilicate; whorls 5, convex, transversely 

 very finely striated, last whorl about one-half the length of 

 the shell, somewhat ventricose, and sometimes roundly angu- 

 late at its periphery, enriched by a narrow yellowish band, 

 which occasionally shows itself at the sutures of the spire ; 

 aperture elongate-ovate, sharply angulate posteriorly; lip 

 simple, continued over the columella by a callosity; umbili- 

 cal channel rather narrow, carinate on its edge. 



6. Cyclophorus ? scALARiFORMis, Pease. 



Description. — T. oblongo-ovata, sub-cylindracea, sinistrorsa, 

 fulva, versus apicem rubella, Igevis, compresse umbilicata, 

 longitudinaliter costata, costis 20, vis obliquis; anfr. 6, ro- 

 tundatis, sub ventricosis, sutura ben^ impressa ; apertura cir- 

 cularis ; perist. continuo, expanso, duplici, posteriore ad anfr. 

 penultimo adnato ; sutura umbilicali rimosa, costa circumam- 

 biente finita. 



Dimensions. — Long. 8|, diam. IJ mill. 



Shell sub-cylindrical, oblong-ovate, sinistral, compressly 

 umbilicate, light amber-color; longitudinally ribbed; ribs 

 about 20 in number, slightly oblique; whorls 6, rounded, 

 somewhat swollen, the spire much lessened at the apex, and 

 the whorls smooth and of a pink color ; suture distinct, and 

 well impressed ; aperture circular, the outer edge in a line 

 with the spire; lip double, continuous, expanded, posteriorly 



