CRUCIBULUM. 



Plate 

 S|ieeies 21. (Fig. a, b, Mus. Cuming.) 

 Crucibclum serkatum. Cruc. testa suborbicidari, te- 

 nui, depressd, pellucido-albd, purpureo-castaneo inter- 

 dum maculatd et nniradiatu, radiatim costatd, costis 

 prommKiitibus, interstitiu decusmtim nigosis, margine 

 serrato, vertice aet/to ; appendice interna vix cyatld- 

 formi, lateraliter valde compressd. 

 The serrated Crucibulum. Shell somewhat orbicu- 

 lar, thin, depressed, transparent white, sometimes 

 spotted and one-rayed with purple chestnut, radiately 

 ribbed ; ribs prominent, with the interstices decus- 

 sately wrinkled, margin serrated, top sharp ; internal 

 appendage scarcely cup-shaped, laterally very com- 

 pressed. 

 Calyptraa serrata, Broderip, Pro. Zool. Soc. 1834, p. 37. 

 Hab. Ileal Llejos and Muerte, Central America (found on 

 dead shells in a muddy bottom at a depth of from six 

 to eleven fathoms) ; Cuming. 

 A thin semi-transparent white shell very conspicuously 

 ribbed, usually characterized by a single dark ray of purple- 

 chestnut. 



Species 22. (Fig. a, b, Mus. Cuming.) 

 Crucibulum sordidum. Cruc. testa subconicd, nordide 



luted, iiitus cinereo-fuscd, subradiatd, vertice subtur- 



bitiato ; appendice interna subtrigono-compressd, crys- 



taUino-albd. 

 TuE SORDID Crucibulum. Shell subconical, sordid 



yellow, ash-brown within, faintly rayed, top slightly 



turbinated ; internal appendage somewhat triangularly 



compressed, crystalline-white. 

 Calyptreca sordida, Broderip, Pro. Zool. Soc. 1834. p. 37. 



Eadem var. Calyptrira unguis, Broderip. 

 Hab. Valparaiso and Panama (found on stones and shells) ; 



Cuming. 

 A small cap-shaped species of a yellowish ash-hrown 

 colour in the interior, with a laterally compressed crystalline 

 appendage. The shell represented at Fig. 22 b is Mr. 

 Broderip's Calyptraa unguis. 



Species 23. (Fig. a, b, Mus. Cuming.) 

 Crucibulum concameratum. Cruc. tesld pileiformi, 

 vertice acuto, valde ittcurvo, albidd, radiatim costatd, 



VII. 



costis prominenlibus, interstitiis undique profundi con- 

 cameratis ; appendice interna subcyathiformi, ampld, 

 ad latus ajfixd. 

 The vaulted Crucibulum. Shell cap-shaped, top 

 sharp, very much incurved, whitish, radiately ribbed, 

 ribs prominent, with the interstices everywhere deeply 

 vaulted ; internal appendage somewhat cup-shaped, 

 large, affixed to the side. 



Hab. ? 



This remarkable shell, collected by Sir Edward Belcher 

 in the Samarang, but omitted in the ' Zoology ' of the 

 voyage, is curiously chambered into deep vaults. The ribs 

 are very ijrominent, and the interstices between them are 

 crossed throughout by broad septa. 



Species 24. (Fig. a, b, Mus. Cuming.) 



Crucibulum morbidum. Cruc. testd orbiculari, pilei- 

 formi, vertice erecto, centrali, subpellucide alba, con- 

 centrice rugoso-striatd, maculis riifis proyniscuis U- 

 neisque numerosis interruptis pallidi pictd ; appendice 

 interna compresse ci/at/iiformi, ad latus ajjlxd. 



The diseased Crucibulum. Shell orbicular, cap- 

 shaped, top erect, central, semi-transparent white, 

 concentrically wrinkle-striated, faintly painted with 

 promiscuous red spots and numerous interrupted red 

 lines; internal appendage corapressly cup-shaped, 

 fixed to the side. 



Hab. China Seas. 



The faint red painting noticed in the above description, 



and which does not appear in the specimen figured, is very 



characteristic of the species. 



Species 25. (Fig. a, b, Mus. Cuming.) 

 Crucibulum lividum. Cruc. testd pileiformi, subirre- 

 gulari, lenui, Uvido-fuscd, lineis rufs tenuissimu de- 

 cussatim pictd ; appendice interna compresse cyathi- 

 formi, ad latus affixd. 

 The livid Crucibulum. Shell cap-shaped, rather 

 irregular, thin, livid-brown, decussately painted with 

 very fine red lines ; internal appendage compressly 

 cup-shaped, fixed to the side. 

 Hab. China Seas. 



Very like the preceding species but of more irregular 

 growth, and of a peculiarly livid colour on the fine red- 

 line painting strongly marked at the margin. 



February, 1859. 



