10 Dr. r. p. Carpenter on new Forms of Mollusks 



35, Cythnia asteriaphila. 



C. testa C. tutnenti simillima, sed umbilico minore, haud carinato , 

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

 Bt\ lineo, apice niainillato : operculo tenuissimo, elementis conceu- 

 tricis, nucleo sitbmediauo sinistrorsum sito. Long. '03, long, 

 spir. -01.5, lat, -025 poll., div. 60°. 



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

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

 culum distinguish it. 



36. Bittium nitcns. 



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

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

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

 haud contiguis, angustis, interstitiis undatis ; costulis rotundatis, 

 spiralibus, in spira iv., quarura 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 iuconspicuo. Long. '21, long. spir. "16, lat. 'Oti poll., div. 20°. 



37. Manyelia subdiaphana. 



M. testa parva, subdiaphana, albida, interdurn rufo-fusco pallida 

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

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

 excurvatis, haud angulatis, suturis impressis ; fascia super spiram 

 paUide 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. 'I'J, 

 long. spir. •], lat. 'OO poll., div. 30°. 



38. Drillia appressa. 



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

 diore ; marginibus spiree excurvatis; anfr. norm, vi., plaiiatis, 

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

 et postice obsoletis; striolis spiralibus creberrimis ; costa spirali 

 irregular! postica, tuberculosa, super suturas aj)pressa ; 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, interdurn altera peripheriali ornata ; mar- 

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

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

 rotundataj costis radiantibus circ. i\., acutis, distautibus, antice 



218 



