8 Dr. P. P. Carpenter on new Forms of MoUusca 



tioribus ; rugulosa, lineis distantibus spiralibus irregulariter in- 

 sculpta ; anfr. nncleosis ?. . . . (detritis), vertice late mamillato ; 

 norm, iv., rapidius augentibus, tumidioribus, suturis satis im- 

 pressis ; basi rogulariter excurvata, vix riaiata ; apertura suborbi- 

 culari, baud continua ; labro acuto; labio supra parietem obsolcto, 

 supra columellam arcuatam iDlns calloso; operculo, aufr. iv. kind 

 rapide augentibus. Long. '21, long-, spin "09, lat. "17, div. 70°. 



Hab. Neeah Bay; one specimen among Lacuna [Swan). 



May be an aberrant Assiminea. 



40. Mangelia crebricostata. 



M. testa tereti, rufo-fusca, albo zonata ; anfr. nucl. ? . . . (decollatis) ; 

 norm. v. elongatis, subrotundatis, suturis impressis ; costis radi- 

 antibus, obtusis, subrectis, circ. xv., spiram ascendentibus ; sculp- 

 tura spirali? . . . (detrita) ; apertura pyriformi, antrorsum in ca- 

 nalem brevem attenuata ; labro postice parura sinuato ; labio con- 

 spicuo. Long. -54, long. spir. '3, lat. "2, div. 28°. 



Hab. Neeah Bay; 1 specimen (Swan). 



41. Ma7igelia interfossa. 



M. testa parva, valde attenuata, rufo-fusca, marginibus spirse parum 

 excurvatis ; anfr. nucl. ii., ut in Chrysodomo irregularibus, apice 

 mamillato ; norm, vi., parum excurvatis, baud tabulatis, suturis 

 distinctis ; costis radiantibus circ. xv., angustis, extantibus ; cos- 

 tulis spiralibus circ. xv., quarum circ. v. seu vi. in spira monstrantur, 

 angustis, supra costas transeuntibus, ad intersectiones parum no- 

 dulosis ; interstitiis altis, quadratis ; basi efFusa ; apertura sub- 

 pvriformi ; labro acuto, postice vix emarginato ; labio teuui. 

 Long. -38, long. spir. -22, lat. -13, div. 25°. 



Hab. Neeab Bay; very rare (Swan). 



42. "? Mangelia tabulata. 



f.JM. testa parva, solidissima, luride rufo-fusca, marginibus spirse ex- 

 curvatis ; vertice nucleoso cbalcedonico (eroso) ; anfr. norm, v., 

 j»ostice rectangulatim tabulatis, suturis impressis ; costis radianti- 

 bus circ. xvi., validis, obtusis, circiter basim attenuatam obsoletis ; 

 costis spiralibus in spira iii.-iv. angustis, extantibus, supra cost, 

 rad. nodosis ; interstitiis alte insculptis, subquadratis ; costis circa 

 basim circiter vii., quadratim extantibus, interstitiis a lineis incre- 

 menti vix decussatis ; canali curta, aperta ; labro acutiore. ad an- 

 gulum posticum vix sinuato ; labio tenui ; columella obsolete uni- 

 plicata. Long. MS, long. spir. '26, lat. '2, div. 35^. 



Hab. Neeah Bay; several worn specimens ((Sii;/7n). 



The distinct fold near the base of the pillar may require the 

 formation of a new geuus. 



242 



