C ALYPTR^.A. 



Plate VIII. 



Species 30. (Fig. a, I, c, d, Mns. Cuming.) 

 Oalyptr.ea scutulom. Calyp. testa orbiculari, regula- 

 riter convexd, pelUtcido-albd, hyalind, radiatim liratd, 

 liris aqtddistantibus, iiderditm radiatim striatis, ver- 

 iicepostico, mcinato ; appendice interna parvd. 

 The little shield Calyptej:a. Shell orbicular, regu- 

 hirly couvex, transparent-white, hyaline, radiately 

 ridged, ridges equidistant, interstices radiately stri- 

 ated, top posterior, hooked; internal appendage 

 small. 

 Hob. Philippine Islands ; Cuming. 



Characterized by a brood orbicular form, with the radi- 

 ating ridges rather conspicuous, at equal distances. 



Species 31. (Fig. a, b, Mus. Cuming.) 

 Calyptr.^a ACi'LEATA. Cali/p. testd siiborbiculari, de- 

 presso-convexd, pellucido-albd, hyalind, sub lente te- 

 iiuissime radiatim striata, margim corrugatd, acule- 

 ato-sqiiamatd, squamis promiscuis, subdistaniibus, ver- 

 tice postico, acute uncinato; appendice intm-ud gracili. 

 The pkickly Calyptr.«a. Shell nearly orbicular, de- 

 pressly convex, transparent-white, hyaline, beneath 

 the lens very finely radiately striated, crumpled at 

 the margin, prickly scaled, scales promiscuous, rather 

 distant, top posterior, sliarply hooked ; internal ap- 

 pendage slender. 

 llab. Honduras; Dyson. 



This very delicate little species is" distinguished from all 



others by the presence of a number of rather distant squa- 

 mate spines. 



Species 32. (Fig. a, b, Mus. Cuming.) 



Calypte^a Vanikorensis. Calyp. testd oblique conicd, 

 crassiusculd, pellucido-albd, radiatim liratd et striatd, 

 vertice postico, elevato ; appendice interna perobliqud. 



The Vanikoko Calyptr^ia. Shell obliquely conical, 

 rather thick, transparent-white, radiately ridged and 

 striated, top posterior, raised; internal appendage 

 very oblique. 



QuoY, Moll. Yoy. de TAstrolabc, pi. 72. f. 20-24. 



Hab. ? 



Resemliling C. sciitulum in sculpture, but of more rude 



oblique growth. 



Species 33. (Fig a, b, Mus. Cuming.) 



Calyptr.ea umbo. Calyp. testd elevato-conicd, pileiformi, 

 pellucido-albd, radiatim liratd et striatd, liris rude 

 fortibtis, rugoso-interruptis, verti.ce subpostico, unci- 

 nato ; appendice interna gracili. 



The boss Calypte^a. Shell elevately conical, cap- 

 shaped, transparent-white, radiately ridged and stri- 

 ated, ridges strong, roughly interrupted, top subpos- 

 terior, hooked ; internal appendage slender. 



Hab. Honduras; Dyson. 



The ridges of this little erect, cap-shaped species are 



strong and peculiarly roughened. 



December, 1858. 



