NATICA. 



Plate IX. 



Pig 33. (Mus. Cuming.) 



This very delicately coloured shell is the var. (i, Jidea 



sen slraminea, of N. auraiitla, noted by Rechiz in Pro. 



Zool. Soc. 1847, p. 211. It is from Port Essiugton, 



north coast of New Holland. 



Species 33. (Mus. Cuming.) 



Natica ALABASTEli. Nat. tesfS pi'oftmde umbilicatd, ah- 

 breviato-globosa, veiitricosn, spird parvd, siihcaUosd, 

 anfracfibus lavihus, rotiindatis, columeUd caUoso-re- 

 volutd ; eburned. 



The ALABASTER Natica. Shell deeply umbilicated, 

 shortly globose, ventricose, spire smaD, rather callous, 

 whorls smooth, rounded, columella callously rolled 

 back ; ivory-white. 



Hah. Mazatlan. 



A pure white species, distinguished by an inflated 



shortly globose form, with a very small spii-e. 



Species 34. (Mus. Cuming.) 



Natica plumbea. Nat. testa atiffiiste prof nude nmbili- 

 catd, obloiKjo-turljinatd, spird conoided, apice acuta, 

 anfraciibus rude diagonaliter striatis, ad snturam. ob- 

 solete pUcatis, deinde rotundatis, apertiird ovatd, colu- 

 mella superne calloso-encaustd ; plicmbeo-ffrised, plic/s 

 ad suturam rufescentibus, marghie umbiUci et encausti 

 columellari vlvide sanguineo. 



The leaden Natica. Shell narrowly deeply umbili- 

 cated, oblong-turbinated, spire conoid, sharp at the 

 apex, whorls rudely diagonally striated, obsoletely 

 puckered at the suture, then rounded, aperture ovate, 

 columella callously enameDed at the upper part; 

 leaden-grey, pleats at the suture reddish, edge of the 

 umbilicus and columeUar enamel bright red. 



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

 632. 

 Natica sordida, Swainsou. 



Hab. Brisbane Water, east coast of Australia ; Strange. 

 This fine species may be readily distinguished by its 



oblong-turbinated form and leaden-grey colour, the colu- 



raellar enamel and umbilicus being edged with deep 



blood-red. 



Species 35. (Mus. Cuming.) 

 Natica deiodosa. Nat. testa obtecte umbilicatd, de- 

 presso-omtd, neritoided, spird inimitd, laterali, an- 

 fraciibus tenuistriatis, nitentibus, couvexis, wltimo ob- 

 lique proloiigato, sitbtus planato, aperturd semilunari, 

 parviusculd, columeUd densissinm callosd, callositate 

 umiilicmn implente ; pallide stramined, callositate 

 eburned. 

 The svLriiUK Natica. Shell with a covered umbilicus, 

 depressly ovate, ncritoid, spire minute, lateral, whorls 

 finely striated, shining, convex, the last obliquely 

 prolonged, flattened beneath, aperture semilunar, 

 rather small, columella very thickly callous, callosity 

 filling the umbilicus ; pale straw-colour, callosity 

 ivoiy-white. 

 Hab. Australia. 



This fine species agrees in its debcate tone of colouring 

 with the straw-coloured variety of N. auraiitia represented 

 at Fig. 33, but is of quite a distinct form, being distin- 

 guished by a particularly contracted Nerite-bke growth. 



36. (Mus. Cuming.) 

 Natica Priamus. Nat. testa compresse anguste umiili- 

 catd, abbreviato-globosd, temdculd, injlatd, spird mi- 

 nutd, laterali, anfractibus couvexis, tenuistriatis, ni- 

 tentibus, aperturd ovatd, ampld, effusd, columella la- 

 iiiind callosd super umbiUcum revolutd ; pallide livido- 

 castaned, spiraliter zonatd, macnlis brumieis panels 

 promiscue cingnlatd. 

 The Priamus Natica. Shell compressly narrowly um- 

 bilicated, shortly globose, rather thin, inflated, spire 

 very small, lateral, whorls convex, finely striated, 

 shining, aperture ovate, large, efi'used, columella with 

 a callous lamina rolled back over the umbOicus ; pale 

 livid chestnut, spii'aUy zoned, encircled with a few 

 promiscuous brown spots. 

 Recluz, Pro. Zool. Soc. 1843, p. 213. 

 Ilab. Moluccas. 



A very distinct species, allied to N. Maura, distin- 

 guished by a pattern of marking somewhat similar to that 

 which is characteristic of the genus Priamus. 



April, 1855. 



