10 Dr. P. P. Carpenter on new Forms of Mollushs ' 



35. Cythnia asteriaphila. 



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

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

 stylineo, apice riianiillato : operculo tenuissimo, elementis eoiicen- 

 tricis, nucleo submediano sinistrorsum sito. Long. 'OS, long, 

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



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

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

 culum distinguish it. 



36. Bitiium nitens. 



B. testa regulari, rufofusca, hie et illic pallida, maxime nitente ; 

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

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

 baud contiguis, angustis, interstitiis undatis ; costulis rotundatis, 

 spiralibus, in spira iv., q\iarum postica multo minor, supercur- 

 rentibus, ad iatersectiones subnodosis ; costulis circa basim sub- 

 rotundatam iv., baud decussatis ; apertura subquadrata ; columella 

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

 labio inconspicuo. Long. '21, long. spir. "16, lat. 'Ot) poll., div. 20°. 



37. Manyelia suMiaphana. 



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

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

 nucleosis iii., Isevibus, diaphanis, apice mamillato ; norm, iv., satis 

 excurvatis, baud 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 baud dentato ; labio 

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

 long. spir. -1, lat. -06 poll., div. 30°. 



38. Drillia appressa. 



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

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

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

 et postice obsoletis ; striolis spiralibus creberrimis ; costa spiral! 

 irregulari postisa, tuberculosa, super suturas appressa ; area sinus 

 parvi vix definita ; basi satis prolongata ; apertura subquadrata ; 

 labio distincto. Long. -3, long. spir. •]/, lat. -12 poll., div. 40°. 



39. Cithara fusconotata. 



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

 macularum, rufo-fusca, interdum altera peripberiali 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 



218 



