NATICA. 



Species 52. (Mus. Cumiug.) 



Natica Maeociiiensis. Nat. testa umlilicatd, glohosu- 

 ventricosd, spird exsertiusculd, anfractibm lamgatis, 

 rottttidatis, aperturd lunar i-ovatd, suieffusd, columeUd 

 tenniculd, callositate columnari spirali mnbilicum fire 

 implente ; griseo-cmrulescente vel squalide rufd, niac/dis 

 trigonis spadiceo-fimcis plus minus indistincte qninque- 

 seriatiiu cingulatd. 



The Morocco Natica. Shell umbilicated, globosely 

 veutricose, spire rather exserted, wliorls smooth, 

 rouiiiled, aperture hmar-ovate, subeffused, columella 

 rather thin, with a columnar spiral callosity nearly 

 filling the umbilicus ; greyish-blue or dirty red, en- 

 circled more or less indistinctly with five rows of 

 arrow-headed fawn-brown spots, 



Lamarck, Anim. sans vert. vol. viii. f. G4.3. 

 Nerita Marocldemis, Gmelin. 

 Natica Ckemnitzii, Menke (not of llecluz). 



Hab. North Africa and West Indies. 



This species is always characterized by being encircled 



with bands of arrow-headed spots, but they are often much 



obscured. 



Species 53. (Mus. Cuming.) 



Natica zebra. Nat. testa umljiUcaid, glohoso-neritoided, 

 subinjlatd, spird obtuse exsertd, anfractibus Immgalis, 

 nitentibus, su-perne dedivibus, delude rotundatis, aper- 

 turd lunato-orhiculari, columelld tenui, callositate co- 

 lumnari spirali, mnbilicum fere implente ; albidd, stri- 

 gis angustis rufis acute luidatis dense longitudinaliter 

 pictd. 



The zebra Natica. Sliell und)ilicated, globosely neri- 

 toid, rather inflated, spire obtusely exserted, whorls 

 smooth, shining, slanting at the upper part, then 

 rounded, aperture lunar-orbicular, columella thin, 

 with a spiral columnar callosity nearly filling the um- 

 bilicus ; white, densely longitudinally painted with 

 narrow, sharply zigzag red streaks. 



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

 643. 



Hab. Cagayau, Province of Misamis, Island of Mindanao, 

 Philippines (in sandy mud at twenty-five fathoms); 

 Cimiiug. 



The longitudinal zigzag red streaks which distinguish 



April. 



this species are now narrow and close-set, now broader 

 and more distant. 



Species 5-1. (Mus. Cumiug.) 

 Natica UBER. Nat. testa subanguste umbiUcatd, oblongo- 

 turbinatd, soUdinsculd, spird exsertd, anfractibtts mi- 

 Hutissime decussafim striatis, superne dedivibus, delude 

 coueexis, aperturd lunari-oblongd, columelld dense en- 

 caustd, callositate parvd ; alba, epidermide tenuissinid 

 induid. 

 The teat Natica. Shell rather narrowly umbilicated, 

 obloug-turbinated, rather soUd, spii-e exserted, whorls 

 very minutely decussately striated, slanting round the 

 upper part, then convex, aperture lunar-oblong, co- 

 lumella densely enamelled, with a small callosity ; 

 white, covered with a very thin epidermis. 

 Valenciennes, in Obs. Gcol. Humboldt, 1833, vol. ii. 



p. 266. 

 Hab. Casma, Peru (in muddy sand at four fathoms) ; 

 Cumiug. 

 This, I believe, is the true N. ubcr of Valenciennes col- 

 lected by Humboldt, and the same species as that collected 

 by D'Orbigny in the same locality, although the specimen 

 figured by the latter is of rather ditt'ereut proportions. 



Species 55. (Mus. Cuming.) 



Natica pellis-tigrina. Nat. testa subampUter perspec- 

 tive imibilicatd, globosd, spird exsertd, apice acuta, an- 

 fractibus superne subdepressls, deinde convexis, laviga- 

 tis, aperturd lunari-omtd, subeffusd, columelld superne 

 eallosd, callositate parvd columnari spirali mnbilicum- 

 iutrante; albidd, macuUs rnfo-pnrpureh interdum 

 cuujlu.entibus dense pictd. 



The tiger's skin Natica. Shell rather largely per- 

 spectively umbilicated, globose, spire exserted, sharp 

 at the ajjex, whorls somewhat depressed at the upper 

 part, then convex, smooth, aperture lunar-ovate, 

 rather efi'used, columella callous at the upper part, 

 with a small columnar spiral callosity entering the 

 umbilicns ; whitish, densely painted with red-purple 

 spots, sometimes flowing together. 



Chemnitz, Couch. Cab. vol. v. p. 265. pi. 187. f. 1892 

 and IS'JS. 



