NATICA, 



Fig. fiS. (Mus. Cuming-.) 



Natica ravida. Nal. Irsfii profit iiJi' perspective nmbili- 

 catd, ijlohosd, solid i. is in /if, .yiird piirtd, ohbtsd, anfrac- 

 tiiiis Uemjaiis, svpcnii: iJeclicihiiH, dvinde convexis, co- 

 lumella superne et wfeme densissinie callosd, aper- 

 turd lunari-ovatd, parviusctdd ; alba, epiderrnide temd 

 luted sidirufjosci corned iiidutd. 



The tawny Natica. Shell deeply perspectively umbili- 

 cated, globose, very solid, spire smaU, obtuse, whorls 

 smooth, slanting at the upper part, then convex, co- 

 lumella very densely callous, above and below, aper- 

 ture lunar-ovate, rather small ; white, covered with a 

 thin, rough, horny, yellowish epidermis. 



SouLEYET, Voyage de la Bonite. 



Hah. St. Elena, West Columbia (in sandy mud at six 

 fathoms) ; Cuming. 

 A shell of pecidiar solid globose growth, marble- white, 



covered with a thin, rough, yellowish epidermis. 



Species 69. (Fig. a to d, Mus. Cuming.) 

 Natica orientalis. Nat. testa late imihilicatd, sitbylo- 

 bosd, peculiariter laxe convolutd, spird parvd, siibim- 

 mersd, suturd imp-essd, anfractibns rotnndatis, lavi- 

 ffntis, juxfa suturam radiatim corrugatis, rapid!} lon- 

 tjitudinaliter dilatatis, aperturd oblongo-oeatd, am- 

 pliter dilutato-effusd, colmiielld supra et infra callosd, 

 callositate cohnnnari spirali mnljUicitm. iidraiile, fith-o- 

 castaned vel elmrned. 

 The oriental Natica. Shell broadly umbilicated, sub- 

 globose, peculiarly loosely convoluted, spire small, 

 somewhat immersed, suture impressed, whorls round- 

 ed, smooth, radiately wrinkled next the suture, ra- 

 pidly longitudinally dilated, aperture oblong-ovate, 

 largely dilately eftused, columella callous above and 

 below, with a columnar spiral callosity entering the 

 umbilicus ; fulvous-chestnut, or white. 

 Nerita orientalis, Gmclin, Syst. Nat. p. .3673. 



Natica ehnrnea, Deshayes. 

 Ilab. Singapore (in sandy mud, at four to six fathoms) ; 

 Cuming. 

 The two varieties of this very characteristic, loosely 

 convoluted, dilately effused species, arc respectively de- 

 scribed ^by Chemnitz as snbfatoa and ehiiriieu, but not 

 named. 



Species 70. (Mus. Cuming.) 



Natica rdfa. Nat. testa e.rcimilo-inubiricald, (jlol)oso- 

 neritoided, soliditisculd, spird lireri, inifruciilius rolitii- 

 datis, snpen/i declivib/ts et leiiiii p/icti/o-corrHgatis, 

 iiperliird lunari-ovatd, colimelld superne callosd, cal- 

 lusiliife colimiuari parvd spirali umhilicmn. intrauie ; 

 fulco-castaned, fascia pallidd cimjalaid, infra et jnxta 

 suturam albd. 



The red Natica. Shell excavately umbilicated, glo- 

 bosely neritoid, rather solid, spire short, whorls 

 rounded, slanting at the upper part, and finely pli- 

 cately wrinkled, aperture lunar-ovate, columella cal- 

 lous at the upper part, with a small spiral colunmar 

 callosity entering the umbilicus ; fulvous-chestnut, 

 encircled with a pale baud, white beneath and next 

 the suture. 



Lamarck, Auira. sans vert. (Deshayes' edit.), vol. viii. p. 

 G39. 

 Nerita rifn, Born. 



Uub. Singapore (in sandy mud, at six fathoms) ; Cuming. 

 This and N. spadir.ea are probably varieties, yet the 



former is of larger ventricose growth, and is concavely 



impressed next the suture. 



Species 71. (Mus. Cuming.) 



Natica solida. Nat. testa suhohtecle umhUicatd, <jlo- 

 tjoso-neritoided, crassd, solidd, spird abtrreviato-cono- 

 ided, anfractibus superne coitcavo-declivibus, deinde 

 rotundatis, Ixvigatis, aperturd lunari-ovatd, columella 

 superne dense encaustd, encausto super umliiUcmn revo- 

 lutd; violaceo-castaned, encausto columellari iutense 

 purpureo-castaneo, niteute. 



The solid Natica. Shell with a nearly covered umbi- 

 licus, globosely neritoid, thick, solid, spire shortly 

 conoid, whorls concavely slanting at the upper part, 

 theu rounded, smooth, aperture lunar-ovate, colu- 

 mella thickly enamelled at the upper part, enamel 

 roUed back over the umbilicus ; violet-chestnut, co- 

 lumellar enamel dark purple-chestnut, shining. 



Bi.ai.n'ville, Malacologie, pi. 36. f. 8. 



//(//;. San Nicolas, Island of Zebu, Philippines (in sandy 

 mud, at ten fathoms) ; Cuming. 

 Characterized by a peculiarly dark violet-chestaut 



enamel. 



April, 1855 



