NATICA. 



Species 13. (Mus. Cuming.) 



Natica prrspicua. Nat. testa compreme perspective 

 nmliilicata, ohlongo-oriitii, spird fnihtiirhbiatd, olitnsd, 

 anfractibus snperiie di-c/iri-roi/rr.r/s, dtiiiife rotiiinhilis, 

 /■aviffatis, vel minutissiiue deciixsulim slriulis, nJtiiiiu 

 conspicue descendeiite, aperturd limari, cohuiieUd cal- 

 losd, prtccipiie ad partem superiorem; rosaceo-albd, 

 nmbilico castaneo. 



The perspicuous Natica. Shell compressly perspec- 

 tively umbilicated, oblong-ovate, spire slightly turbi- 

 nated, obtuse, whorls slantingly convex, then rounded, 

 smooth, or minutely decussately striated, last whorl 

 conspicuously descending, aperture lunar, columella 

 callous, especially at the upjier part ; pink-white, 

 umbilicus chestnut. 



Recluz, Petit, Journ. Conch, vol. i. p. 370. pi. 14. f. 1, 3. 



Hab. Mouth of the Oregon Eiver, Upper California; 

 Lieut. Baskerville. 

 The chief characteristic of this species consists in its 



open, compressly perspective purple-chestnut umbilicus, 



arising from the last whorl being loosely convoluted, and 



more than usually descending below the other. 



Species 1.3. (^lus. Cuming.) 



Natica Cumingiana. Nat. testa prof/mdissime perspec- 

 tive umbilicatd, ovato-veiitricosd, solidiuscidd, spird 

 obttmo-conoided, apice acuta, anfractibus lavibus, ni- 

 teutibus, vel miuutissime striatis, ad sjttiiras callosis, 

 deinde declivi-convexis, aperturd semitutiari, columelld 

 leviter calloso-rejlexd ; anrantid vel aiirantio-spadiced, 

 fasciis duabus albis dilntis spiratibiis jiixta svtnras. 



Cuming's Natica. Shell very deeply perspectively umbi- 

 licated, ovately ventricose, rathei; solid, spire obtusely 

 conoid, sharp at the apex, whorls smooth, shining, 

 or very minutely striated, callous at the sutures, 

 then slantingly convex, aperture semilunar, columella 

 slightly callously reflected ; orange, or orange-fawn, 

 with two spiral infused white bauds next the suture. 



Recluz, Pro. Zool. Soc. 1813, p. 310. 

 Eadera, Natica paUiidii, Recluz. 



Hab. Island of Cuyo, Philippines (in sandy mud, deep 

 water) ; Cuming. 

 This fine species is chiefly characterized by its infused 



white double sutural band, and deep perspective umbili- 

 cus, on the columellar side of which there is only a mode- 

 rate callosity. 



Species 14. (Mus. Cuming.) 

 Natica canrena. Nat. testa sitbangiiste profunde miibi- 

 licatd, siibglobosd, ventricosd, spird brevi, subprominula, 

 aiifracfib/is lavibus, spiraliler rotimdatli, ultimo antice 

 suhdescciidente, aperturd semilmiari, colimdld callosi- 

 tate mediocri; rufesceiite-cnsfaneu, :oiiis pallidis cin- 

 gulatd, zonis strigis nigricaute-fHScis uiidntis longitu- 

 dinaliter pictis, basi alba. 

 The flamed Natica. Shell rather narrowly deeply 

 umbilicated, subglobose, ventricose, spire short, 

 rather prominent, whorls smooth, spirally rounded, 

 the last somewhat descending in front, aperture semi- 

 lunar, columella with moderate callosity; reddish- 

 chestnut, encircled with pale zones longitudinally 

 painted with zigzag blackish-brown streaks, base 

 white. 

 LiNN.Eus, Mus. Ulr. p. 674. 

 Hab. West Indies. 



The zigzag-marked bands of this well-known species 

 are sometimes neatly articulated. The operculum is cu- 

 rious in being of a solid testaceous substance circularly 

 grooved. 



Species 15. (JIus. Cuming.) 

 Natica effusa. Nat. iestd profundi nvMlicatd, ovato- 

 ventricosi, spird brevissimd, mamiUari, anfractibus 

 convexis, nitentibus, miuutissime decussatim striatis, 

 ad siitiiras opaco-callosis, nltimo subeffuso, aperturd 

 sewiluiiari, columelld callositate mediocri; subpellu- 

 cido-albd. 

 The EFFUSED Natica. Shell deeply umbilicated, ovately 

 ventricose, spire very short, mamillary, whorls con- 

 vex, shining, very minutely decussately striated, 

 opakely callous at the sutures, last whorl rather ef- 

 fused, aperture semilunar, columella with a moderate 

 callosity ; subtranspareut-white. 

 SwMiNSON, Zoological Illustrations, pi. 104. 

 Ilab. Moluccas. 



A rather light subpellucid-white effuseil mamillary spe- 

 cies, a Uttle opake in the sutures. 



April, 1855. 



