161 



Calyptrxa fastigiata. Testa parva, tenuis, Isevis, rotun- 

 data, elevato-conica, concentrice et tenuissime striata, epider- 

 mide fusescente induta ; spira anfract. 3 planulatis, apice sub- 

 mediano, acuto : lamella interna spiralis, striata marginc libero ad 

 centrum duplicato, baud appresso, umbilicum parvum cflbrmante. 

 Diam. I, alt. | poll. Hah. Puget Sound. 



In shape, size and interior, it scarcely differs from C. pihohis, 

 D'Orb., but that shell is white, has a rough surface, and is radi- 

 ately ribbed about the summit. It also resembles C. squama^ 

 Brod. 



CALYPTRiEA RADiosA. Testa irregularis, tenuis, alba, lucida, 

 ad basim rotundata, oblique globoso-conica, lineis acutis numero- 

 sis elevatis cum striis tenuissimis intercalariis radiata ; apice 

 postico, obtuso : lamella interna elongata, semi-volutata, per- 

 oblique truncata ; cornubus lanceolatis ; basi attenuate. Diam. 

 -|, alt. -^-^ poll. Hab. Mangsi Islands. 



Differs from C. equestris, lithedaphus, and other similar spe- 

 cies, in having rather distant, regularly-disposed raised lines, 

 with intervening smaller ones, instead of their being all of uni- 

 form size. 



Calyptr.ea ciilorina. Testa irregularis, tenuis, concentrice 

 undosa, lineis elevatis acutis confertis radiata, ad basim subcir- 

 cularis, oblique pyramidata, epidermide tenui chlorico induta ; 

 apice elevata, posteriori, spirali, cernuo : intus nitida, porcellana ; 

 margine evoluto, acuto ; lamina interiori semi-cyathiformi, brevi, 

 reflexo, oblique truncato. Long, i, lat. ^^j, alt. -^ poll. Hab. 

 Port Praya, Cape de Verds. 



Allied to C. equestris. Its depressed, orbicular and compara- 

 tively regular form,. its short cup, and its color, are its character- 

 istics. 



IIiPPONix IMBRICATA. Tcsta soHda, oblique elevato-conica, 

 rubescens, costulis acutis radiantibus 40-50, et lamellis concen- 

 tricis concinne imbricato-clathrata ; apice submediano : apertura 

 rotundato-ovata : intus coccinea. Long, -j^, lat. X^., alt. -rf^ P^^^- 

 Hab. Sandwich Islands. 



Most like H. pilosa in sculpture, though the pattern is much 

 coarser. The apex is far more central and elevated. The color 

 of the interior is like H. foliacea, but more intense. 



PiLEOPSis CRYSTALLINA. Tcsta parva, Candida, crystallina, 



