NATICA, 



Species -1-. (Mus. Cuming.) 



NiTICA DUPLICATA. Nat. tl'dii SIlMll'Cli lUilbUicilId, 



siihoUongo-globosd, spird exsertd, anfractibus IcBvibus, 

 rotimdalis, s/ipenie subdi'press'iK, ad mtnrnni obsolete 

 liiartjbiatis, aperturd snboblongd, lahro coluhidlari mib- 

 callom ; sordide cinered, epidermide tfiini fidrhh! in- 

 diitd. 

 The duplicate Natica. Shell with a slightly covered 

 umbilicus, suboblong-globose, spire exserted, whorls 

 smooth, rounded, a little depi-essed at the ujiper 

 part, obsoletely margined at the suture, aperture 

 rather oblong, columellar lip rather callous; dirty- 

 ash, covered with a thin fulvous epidimnis. 

 Say, Journ. Acad. Nat. Sci. Philadelphin, vol. ii. p. iM. 

 Hob. Bay of Massachusetts, United States ; Newfoundland. 

 This species scarcely differs from N. Iicros, inhabiting 

 the same locality, except in being of a more oblong form, 

 which is of doubtful importance. The shell iigured by 

 Dr. Gould for this species, in his work on the Invertebrata 

 of JIassachu.setts, at No. 164, appears to be N. R('dii:iana. 



Species 5. (Mus. Cuming.) 



Natica glauca. Nat. testa snpcrjicialifcr iiinhilicald, Jc- 

 pri'.'iso-orbicidari, .11114118 excavatd, tciui'iciild, spird brc- 

 rmiind, plano-concavd, anfractiius dense arcnuto-slr'ia- 

 tk, dedm-convexis, ad peripheriam. obsolete rot audit to- 

 car'matis, aperturd depresso-obllqud, labia saperiie le- 

 riter siniiato, columeUd callositate insigni spirali, e.v- 

 tits ptanatd ; plus minus glaued, intus nitente-castancd, 

 cnllositate intense custancd. 



The grey Natica. Shell superficially umbilicated, dc- 

 pressly orbicular, excavated beneath, rather thin, 

 spire very short, flatly concave, whorls densely ar- 

 cuately striated, slantingly convex, obsoletely rotun- 

 dately keeled at the periphery, aperture deprcssly 

 oblique, lip slightly sinuated at the upper part, co- 

 lumella with a peculiar spiral callosity, outwardly 

 flattened ; more or less grey, interior shining chest- 

 nut, callosity dark chestnut. 



Humboldt, Deshaj^es, Anim. sans vert. vol. viii. p. ('>.)1. 

 Natica patnla, Sowerby in Zool. Journ. vol. i. p. GO, 

 pi. 5. 



Hah. West Columbia (in sandy mud, deep water) ; Cuming. 

 A light, concavely depressed species, with an extremely 



characteristic, flatly-abraded, spiral callosity. Humboldt's 



name for this species not having been fairly published by 



the illustrious traveller, would seem to give Mr. Sowerby's 

 some authority, but that there is a fossil Natica patnla.. 



Species G. (Mus. Cuming.) 

 Natica Lamakckiana. Nat. testa aperte umbllicaid, de- 

 presso-globosd, spird convexd, vix elevatd, anfractibus 

 lavigatis, minute dny/ssfitljii s/rialis, aperturd oblongu- 

 ovatd, subawpld, cului.ii'lUl tfimiculd, callositate lata, 

 sulcata, rccurrd, uuibiUco ainplili'r angulato-o'caxvito ; 

 spadiceo-grised, obscure fa sci aid, callositate castaned. 

 Lamakok's Natica. Shell openly umbilicated, depressly 

 globose, spire convex, scarcely raised, whorls smooth, 

 minutely decussately striated, aperture oblong-ovate, 

 rather large, columella rather thin, with a broad, 

 grooved, recurved callosity, umbilicus largely angu- 

 larly excavated ; fawn-grey, obscurely banded, callo- 

 sity chestnut. 

 Recluz, MS., ]\Ius. Cuming. 



Ilab. ? 



Eesembling N. problematica in form and colour, but of 

 larger size, and differing slightly at the suture and umbi- 

 lical excavation. 



Species 7. (Mus. Cuming.) 



Natica Ciiejinitzii. Nut. testa anguste subobtecti um- 

 bilicatu, globosd, spird conve.tu,parum elevatd, anfrac- 

 tibus oblique .^triatis, superne depresso-concavis, deinde 

 rotundulis, aperturd pyrifurmi-oratd, colunielUl tenui- 

 culd, callositate latissinid, recurcd, .sulcata ; pluuibeo- 

 grised, subtus albidd, callositate et apertures fa uce cas- 

 taneis. 



Chemnitz's Natica. Shell with a narrow partially co- 

 vered umbilicus, globose, spire convex, but little 

 raised, whorls obliquely sti'iated, depressly concave 

 round the upper part, then rounded, aperture pyri- 

 formly ovate, columella rather thin, with a very 

 Ijroad, recurved, grooved callosity ; lead-grey, whitish 

 beneath, callosity and interior of the aperture chest- 



lUlt. 



Keclvz, J\IS., Mus. Cuming. 



Ilab. ? 



This species presents exactly the same typical charac- 

 teristics as the preceding, more globose in form, with the 

 umbilicus only slightly angularly excavated, and the cal- 

 losity broader and entirely pressed back. 



April, 



