new Species of Mollusca. 165 



sinuatura ; columella recbiuscula, tenuiter callosa ; caualis brevis, 

 latus. 

 Long. 13, maj. diam. 5 mm. 



Hab. Nagasaki. 



Tliis species is cliiefly cliaracterized by a few smooth 

 oblique plicae on the whorls of the spire. 



Columbella plicatospira, sp. n. (PI. X. fig. 2.) 



Testa subcylindracea, polita, pallide lutescens, juxta suturam fascia 

 interrupta rufo-fusca ornata ; spira elata, convexiuscula ; an- 

 fraefcus 6, leviter convexi, haud angulati, plicia numerosis keves 

 crassiusculi, interstitiis paulo angustioribus, longitudinaliter 

 instructi, sutura angustissima sejuncti ; anfractus ultimus 

 oblongus, supra leviter eonvexus, infra medium contractus, infra 

 suturam breviter sed conspicue plicatus, aliter laevis. Apertura 

 elongata, mediocriter lata ; labrum incrassatum, intus quinque- 

 dentatum ; columella rectiuscula tenuissime lamellata. 



Long. 10, maj. diam. 3^ mm. 



Hah. Japan. 



This shell is chiefly cliaracterized by the stout straight 

 plicae on the whorls of the spire and the few short ones, 

 rendered conspicuous by the bright brown interrupted band, 

 and forming a sort of crown to the body- whorl. 



Olivella inusta, sp. n. (PI. X. fig. 6.) 



Testa parva, rimata, oblonga, solidula, nitida, pallide fusco-luteola, 

 saturate fusco late balteata ; spira acuta ; anfractus 5, levissime 

 convexi, sutura angustissimo canaliculata sejuncti ; anfractus 

 ultimus subcylindricus § longitudinis testa? vix sequans, infra 

 lira angusta obliqua instructus, supra et infra nitide fusco late 

 balteatus. Apertura augusto trigona ; labrum vix incrassatum ; 

 columella albo callosa, sinistrorsum obliqua. 



Long. 3g, maj. diam. 2 mm. 



Hab. Florida. 



Chiefly recognized by the two broad shining bands and the 

 cylindrical form of the body-whorl. 



Lotorium (Gymatiuni) h'densis, sp. n. (PI. X. fig. 7.) 



Testa subfusit'ormis, anticerostrata, posticepyramidalis, irregulariter 

 varicosa et longitudinaliter plicata, liris angustis transversis paulo 

 clevatis, creberrime granulosis sculpta, epidermide tenuis partim 

 scabrosa induta ; spira elata, conoidalis ; anfractus 6, primi 

 rotundati, reliquia) obtuse angulati ; anfractus ultimus elongato- 

 pyriformis, latcribus crassivaricosis, plicis paucis distautibus 



