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



tioribus ; rugulosa, lineis distantibus spiralibus irregulariter in- 

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

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

 j)i-eti?is ; basi. rpgulariter excurvata, vix rimata ; apertura suborbi- 

 ciilari, baud continua ; labro acuto ; labio supra parietem obsoleto, 

 supra columellam arcuatara in) us eolloso: operculo, aT)*'--. iv, h.xoA 

 rapide augentibus. Long. •'Ai, long. spir. "09, lat. -17, div. 70°. 



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



May be an aberrant Assiminea. 

 I 



40. Mangelia crebricostata, 



M. testa tereti, rufo-fusca, albo zonata ; anfr. nncl. ? . . . (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 parum sinuato; labio con- 

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



Hab. Neeah Bay; 1 specimen (Sujaw). 



41. Mangelia interfossa. 



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

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

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

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

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

 augustis, supra costas transeuntibus, ad iutersectiones parum no- 

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

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

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



Hab. Neeah Bay; very rare [Swan). 



42. "^.Mangelia tabulata. 



121. testa parva, solidissima, luride rufo-fusca, marginibus spira; ex- 

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

 postice 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. -45, long. spir. -26, lat. -2, div. 35°. 



Hab. Neeah Bay; several worn specimens (Swan). 



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

 formation oi a new Kenus. 



» 242 



