10 Dr. P. P. Carpenter on new Forms of Mollusks 



35. Cythnia asteriaphila. 



C. testa C. tumenfi simillima, sed umbilico minore, baud carinato , 

 tenuissima, diaphana ; anfr. iv., tumidis ; vert. nucl. normali, baud 

 stylineo, apice mamillato : operculo tenuissimo, elementis concen- 

 tricis, nucleo subrnediano sinistrorsum sito. Long. *03, long. 

 spir. -015, lat. -025 poll., div. 60. 



A solitary specimen was found by Dr. Stimpson, imbedded in 

 a star-fish, like Sty Una ; from which genus the vertex and oper- 

 culum distinguish it. 



36. Bittium nitens. 



B. testa regulari, rufo-fusca, hie et illic pallida, maxime nitente ; 

 anfr. nucl. iii., laevibus, tumidis, apice submamillato, subdeclivi ; 

 norm, vi., tumidis, suturis impressis ; costis radiantibus circ. xiv., 

 haud contiguis, angustis, interstitiis undatis ; costulis rotundatis, 

 spiralibus, in spira iv., quarum postica multo minor, supercur- 

 rentibus, ad intersectiones subnodosis ; costulis circa basim sub- 

 rotundatam iv., haud decussatis ; apertura subquadrata ; columella 

 haud truncata, obtuse angulata ; labro acuto, a costulis indentato ; 

 labio inconspicuo. Long. -21, long. spir. -16, lat. -Od poll., div. 20. 



37. Manyelia subdiaphana. 



M. testa parva, subdiaphana, albida, interdum rufo-fusco pallide 

 tincta ; satis turrita, marginibus spirse parum excurvatis ; anfr. 

 nucleosis iii., leevibus, diaphanis, apice marnillato ; norm, iv., satis 

 excurvatis, haud angulatis, suturis impressis ; fascia super spiram 

 pallide fusca, alteraque Candida contigua ; costulis radiantibus 

 xiv.-xviii., acutis, subrectis, distantibus, interstitiis undatis ; tota 

 superficie minute et creberrime spiraliter striata ; basi producta, 

 striis magis expressis ; apertura subelongata ; labro ad dorsum 

 incrassato, postice distincte emarginato, intus haud dentato ; labio 

 tenuissimo; columella recta, antice late canaliculata. Long. '19, 

 long. spir. !, lat. '06 poll., div. 30. 



38. Drillia appressa. 



D. testa parva, compacta ; rufo-fusca, interdum supra costas palli- 

 diore; marginibus spirse excurvatis; anfr. norm, vi., planatis, 

 suturis indistinctis ; costis tuberculosis radiantibus circ. xiv., antice 

 et postice obsoletis; striolis spiralibus creberrimis ; costa spirali 

 irregulari postica, tuberculosa, super suturas appressa ; area sinus 

 parvi vix definita ; basi satis prolongata ; apertura subquadrata ; 

 labio distincto. Long. '3, long. spir. '17, lat. *12 poll., div. 40. 



39. Cithara fusconotata. 



C. testa parva, satis turrita, tenui, albida ; postice linea, seu serie 

 macularum, rufo-fusca, interdum altera peripheriali ornata ; mar- 

 ginibus spirse rectioribus; anfr. nucl. ii., rotundatis, apice mamil- 

 lato; norm, vi., in spira rotundatis, suturis impressis; basi satis 

 rotundata; costis radiantibus circ. ix., acutis, distantibus, antice 



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