,330 NAT1CID.E. 



N. NiTiDA, Donovan. 



Of an oblique rounded ovate shape, rarely pure white, usually 

 with five spiral bands of coloured markings on the body-whorl, 

 which is attenuated posteriorly ; whorls shelving, as it were, into 

 each other ; outer lip united to the body at an acute angle ; um- 

 bilicus smooth within, environed by a band of colour. 



Plate C. fig. 2, 3, 4, and (Animal) Plato P P. fig. 5 (as Alderi). 



Lister, Hist. Conch, pi. 561, f. 8 ? 

 Cochlea, Ao. 1324, Linn. Fauna Succica, ed. I. 



Nerita (jlaucina, LiNN. Fauna Suecica (not Syst. Nat. ed. 10 or 12), ed. 2, p. 533. 

 — Mont. Test. Brit. vol. ii. p. 470 (young). — Rack. Dorset 

 Catalog, p. 57, "small ordinary form." — Turt. Conch. Dic- 

 tion, p. 125 (var. B). — Hogg, Trans. Linn. vol. xiv. p. 320, 

 pi. 9, f. 5, 6. — Born, Testacea Mas. Ca;s. Vindob. p. 396, 

 pi. 13, f. 20, 21 ? 

 „ catena, young. Da Costa, Brit. Conch, p. 84. 

 „ nilida, DoNOV. Brit. Shells, vol. iv, pi. 144, copied and enlarged. Brown, 



111. Conch. G. B. p. 13, f. 7, 11? 

 „ mamniiUu, var. c. Dillw. Recent Shells, vol. ii. p. 985 (from Donovan). 

 Natica nilida, Fleming, Brit. Animals, p. 31 9. — Forbes, Malac. Moncns. p. 62. 

 — Macgill. Moll. Aberdeenshire, p. 127 (variety, teste Jelfreys 

 from type). — Brit, ilarinc Conch, p. 148. 

 „ monilifcra, Forbes, Mag. Nat. Hist. vol. ix. p. 191, f. 2 (animal). 

 „ intermedia, Philippi, Moll. Sicil. vol. i. p. 1C3, pi. 9, f. 11, changed to 



Marockicnsis, p. 156, and vol. ii. p. 140. 

 „ castanea, (not of Lam.) Potiez and Mich. Gal. Douai, Moll. vol. i. 



p. -293, pi. 28, f. 24, 25. 

 „ Alderi, Forbes, Malac. Monens. p. 31. — Johnston, Berwick. Club, vol. i. 

 p. 266. — Macgilliv. Moll. Aberd. p. 126. — Brit. Marine 

 Conch, p. 148, f. 82. — Brown, Hlust. Conch. G. B. p. 25, 

 pi. 57, f. 14. — Alder, Cat. Moll. Northumb. and Durh. p. 68. 

 „ glaucina, Philippi, Neue Conch, vol. ii. p. 44, Nat. pi. 2, f. 10, 11. 

 „ monilifera, r/oung. Brown, Hlust. Conch. G. B. pi. 13, f. 1, 2. 

 „ glaucina, PiiiLipri, Neue Conch, vol. ii. p. 10, Nat. pi. 2, f. 10, 11. 



The shell is rather small, more or less solid, and of an 

 oblique and soinewhat globosely ovate figure, which in the 

 adult is always longer than broad. From the marked 

 attenuation of the body at the posterior extremity (it 

 becomes a little narrower, too, anteriorly) the spire seems 



