from the West Coast of North America. 



Opalia huUata, 



0. testa tninore, alba, subdiaphana, turrita, gracili ; marginibus spirfe 

 subrectis ; tota superficie minutissime et crebeirime spiraliter 

 striolata ; vertice nucleoso declivij celato ; dein anfr. ii., globosis, 

 radiatim baud sculptis ; dein v. normalibus, pianatis, suturis vix 

 impressis; lirvilis radiautibus circ. xxvi., baud nisi in anfr. primis 

 expressis, circa basim irregu.ariter rotundatam ad axim continuis; 

 sorie bullularum suturabum anfr. primis e lirulis extantibus for- 

 mata, postea lirulis baud convenientibus, anfr. penult, circ. xvii., 

 pianatis, super suturas parieti appressis, interstitiis baud infossis ; 

 basi subangulata, baud costata ; apertiira subovali, sinistrorsum 

 subplanata ; peritremate continue, calloso ; labro baud siimato. 

 Long. -3, long. spir. -21, lat. -09, div. 20^ 



Hub. Sta. Barbara, one specimen {Jewett). 



422.. Ceritkiopsis purpurea. 



C. testa compacta, baud gracili, marginibus spirse parum excurvatis; 

 purpurea seu fusco-purpurea, circa peri{)heriam pallidiore ; anfr. 

 nucl. ?ii., Isevibus ; norm, vii., pianatis, suturis impressis ; serie- 

 bus iii. nodulorum minorum supra costulas spirales minores, ad 

 intersectiones costularum radiantium circ. xxiii., lineis fere rectis, 

 ad suturas interruptis, spivam asceiidentium sitis ; interstitiis im- 

 pressis, quadratis ; costulis suturalibus ii. baud nodulosis ; basi 

 rotundata, antice lirulis paucis expvessis inter eas et costulas su- 

 turales vix sculpta; apertura subquadrata; columella torta, emar- 

 ginata. Long. "29, long. spir. 'ly, lat. 'l, div. 20°. 



Hah. Sta. Barbara (Jewett); Monterey, San Diego [Cooper). 



423. Cerithiopsis fortior. 



C. testa C.purpureee simili, sed seulptura multo fortiore, basi pallida; 

 seriebus nodulorum spirabbus testa adolescenteii., postea iii.; costis 

 radiantibus circ. xiii,, interstitiis magnis ; costis suturalibus validis, 

 bubnodosis ; costa basab vahda. Long. '3, long. spir. '2, lat. '11, 

 div. 2C°. 



Hab. Sta. Barbara, 1 specimen [Jewett). 



439. Marginella subtrigona. 



M. testa M. Jewetfii simib, sed multo curtiore, latiore ; antice valde 

 angustata, postice valde tumenie ; labro postice minus prolongate ; 

 pbcis iv., validioribus, parietali una. Long. '14, long. spir. "01, 

 lat. -11, div. 130°. 



Hab. Sta. Barbara [Jewett). 



4 -to. Marginella regularis. 



M. testa M. Jewetfii simili, sed multo minore, paullum angustiore ; 

 tenui, nitidissima, crystallina, oiimino diapbana ; labio magis cal- 

 loso. Long. -13, long. spir. -01, lat. -09, div. 120°.. 



Hab. Sta. Barbara [Jewett) ; coast of California soiith from 



287 



