Monograph of Cyproea. 87 



86. CyprcEa Madagascariensis, add. 

 Icon. Wood's Cat. t. 17, f. 61. 



87. Cyproea JVucleus, add. 

 Cypra gemmosa, Perry's Conch. 



Icon. Perry's Cmch. t. 23, f. 6. JFood's Cat. I. 17, f. 62. 



88. CyprcEa Cicercula, add. 



Cyprsea citrina, Humph. Cal. Cat. n. 101. 

 Icon. Oualter, t. 14, /. M. Wood's Cat. t. 17, /. 65. 

 Erase the reference to Bonanni, which belongs to C. Globulus. Add 

 to the description, teeth whitish, base with four deep brown spots. 



89. Cypraa Margarita, add. 

 Icon. Wood's Cat. t. 17, /. 66. 



The shell which I have described was, as I have observed, incomplete ; 

 and I am doubtful, on re-examination, whether it may not be the young 

 of C. Cicercula. 



Mr. Sowerby having shewn me a shell which Mr. Humphreys had in 

 his collection under the above name, which appears to be distinct, I take 

 the opportunity of describing it. 



Cypraa Margarita. 



Testa ovato-globosa, ventricosa, laevigata, albido lutescente, punctis 

 albis irregularibus adspersa ; extremitatibus subproductis ; basi alba, con- 

 vexa; marginibus incrassatis; apertura angusta producta ; dentibus rai- 

 nutis approximatis. 



" Cypreea Margarita. Soland., MSS." Humphreys. 



Porcellana Margarita. Humphreys, MSS. 



Pearl Porcellain Shell. Humphreys. 



Icon. 



Inhabits, " Tinian, South Seas. Per Commod. Byron." Humphreys. 



Shell ovate globular, ventricose, smooth, polished, yellowish white, 

 with scattered irregular-shaped opaque white spots ; extremities rather 

 produced; base white convex, thickened, polished; edges thickened; 

 distinctly margined on the outer side and at the extremities, with a con- 

 siderably produced end, on which are two or three denticulations, as if 



