from the West Coast of North America, 



Opalia huUata. 



0. testa minore, alba, subdiaphana, turrita, gracili ; marginibiis spirse 

 subrectis ; tota superiicie iniimtissime et creberrime spiraliter 

 striolata ; vevtice nucleoso declivi, celato ; deiii antV. ii., globosis, 

 radiatim baud sculptis ; dein v. normalibus, piaiiatis, svituris vix 

 impressis; lirubs radiantibus circ. xxvi., baud nisi in aniV. primis 

 expressis, circa basim irregu!ariter rotundatam ad axim contiuuis; 

 serie bullularum suturaliuni anfr. primis e lirulis extantibus for- 

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

 planatis, super suturas parieti appressis, interstitiis baud infossis ; 

 basi subangulata, baud costata ; apertura subovali, sinistrorsvim 

 subplanata ; peritremate continuo, calloso; labro baud siuuato. 

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



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



422. Cerithiopsis purpurea. 



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

 purpurea seu fusco-purpurea, circa peripheriam pallidiore ; anfr. 

 nuci. 1 ii., Isevibus ; norm, vii., planatis, suturis impressis ; strie- 

 bus iii. nodulorum minorum supra costulas spirales minores, ad 

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

 ad suturas interruptis, spiram ascendentium sitis ; interstitiis im- 

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

 Totundata, antice lirulis paucis expressis inter eas et costulas su- 

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

 ginata. Long. '29, long. spir. -19, lat. -1, div. 20°. 



Hab. Sta. Barbara [Jeivett); Monterey, San Diego [Cooper), 



423. Cerithiopsis fortior. 



C, testa C.purpurece simili, sed sculptura multo fortiore, basi pallida; 

 seriebus nodulorum spiralibus testa adolescente ii., postea iii. ; costis 

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

 subnodosis; costa basali valida. Long. -3, long. spir. '2, lat. -11, 

 div. 26°. 



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



439. Marginella subtrigona. 



M. testa M. Jewettii simili, sed multo curtiore, latiore ; antice valde 

 angustata, pcstice valde tumenie ; labro postice minus prolongato; 

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

 lat. -11, div. 13U°. 



Hab. Sta. Barbara [Jewett), 



440. Marginella regularis. 

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

 tenui, nitidissima, crystaUina, ouuiino diapbana ; labio magis cal- 

 loso. Long. -13, long. spir. -01, lat. -0!), div. 120°. 



Hub. Sta. Barbara [Jewett) ; coast of California south from 



287 



